10-Q/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q/A

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended March 31, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 000-51274

FRONTIER FUNDS

FRONTIER DIVERSIFIED FUND;

FRONTIER MASTERS FUND;

FRONTIER LONG/SHORT COMMODITY FUND;

FRONTIER BALANCED FUND;

FRONTIER SELECT FUND;

FRONTIER GLOBAL FUND (FORMERLY FRONTIER WINTON FUND);

FRONTIER HERITAGE FUND

(Exact Name of Registrant as specified in its Charter)

Delaware	36-6815533
(State of Organization)	(IRS Employer
	Identification No.)

c/o Frontier Fund Management LLC

25568 Genesee Trail Road

Golden, Colorado 80401

(Address of Principal Executive Offices)

(303) 454-5500

(Registrant’s Telephone Number)

Securities to be registered pursuant to Section 12(b) of the Act: None

Securities registered pursuant to Section 12(g) of the Act:

Frontier Diversified Fund Class 1, Class 2 and Class 3 Units;

Frontier Long/Short Commodity Fund Class 2, Class 3, Class 1a, Class 2a and Class 3a Units;

Frontier Masters Fund Class 1, Class 2 and Class 3 Units;

Frontier Balanced Fund Class 1, Class 1AP, Class 2, Class 2a and Class 3a Units;

Frontier Select Fund Class 1, Class 1AP and Class 2 Units;

Frontier Global Fund Class 1, Class 1AP and Class 2 Units;

Frontier Heritage Fund Class 1, Class 1AP and Class 2 Units

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.   Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files)    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer	☐	Accelerated Filer	☐
Non-Accelerated Filer	☒	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes ☐    No   ☒

EXPLANATORY NOTE

The sole purpose of this Amendment No. 1 to the Quarterly Report on Form 10-Q of Frontier Funds for the period ended March 31, 2019, originally filed with the Securities and Exchange Commission on June 24, 2019 (the “Form 10-Q”), is to file Exhibit 101 to the Form 10-Q in accordance with Rule 405 of Regulation S-T. Exhibit 101 provides the consolidated financial statements and related notes from the Form 10-Q formatted in XBRL (eXtensible Business Reporting Language).

No other changes have been made to the Form 10-Q.  This Amendment No. 1 to the Form 10-Q speaks as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date and does not modify or update in any way disclosures made in the original Form 10-Q.

1

ITEM  6. EXHIBITS.

Exhibits (numbered in accordance with Item 601 of Regulation S-K)

101 Financials in XBRL format

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

3

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Balanced Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

4

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Heritage Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

5

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Global Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

6

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Select Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

7

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Long/Short Commodity Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

8

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Diversified Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

9

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Frontier Masters Fund,
	a Series of Frontier Funds
	(Registrant)
Date: June 24, 2019	By:	/s/ Patrick J. Kane
		Patrick J. Kane
		Chairman, Chief Financial Officer, Chief Accounting Officer and Managing Member of Frontier Fund Management LLC, the Managing Owner of Frontier Funds

10

XML

Document and Entity Information	3 Months Ended
	Mar. 31, 2019 shares
Document And Entity Information
Entity Registrant Name	Frontier Funds
Entity Central Index Key	0001261379
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	0
Entity File Number	000-51274

XML

Statements of Financial Condition (Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 418,983	$ 1,729,879
U.S. Treasury securities, at fair value	2,807,036	5,684,327
Receivable from futures commission merchants	2,868,177	11,255,848
Incentive fees receivable	78,845	78,845
Open trade equity, at fair value	135,976
Swap contracts, at fair value	19,800,401	20,149,868
Investments in private investment companies, at fair value	51,672,642	46,557,428
Interest receivable	18,904	117,168
Due from Managing Owner	3,727
Redemptions receivable from private investment companies	358,579
Other assets	22,987
Total Assets	78,186,257	85,573,363
LIABILITIES
Open trade deficit, at fair value		398,189
Owner redemptions payable	89,695	23,759
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner	8,966	78,045
Interest payable to Managing Owner	7,397	10,852
Service fees payable to Managing Owner	78,790	96,152
Trading fees payable to Managing Owner	196,162	222,241
Risk analysis fees payable	15,267	27,562
Advance on unrealized Swap Appreciation	12,191,555	12,191,555
Subscriptions in advance for service fee rebates	548,696	497,326
Subscriptions payable to private investment companies	105,800
Other liabilities	30,246	4,003
Total Liabilities	13,272,574	13,560,581
CAPITAL
Managing Owner Units	707,298	851,595
Limited Owner Units	64,206,385	71,161,187
Total Owners' Capital	64,913,683	72,012,782
Total Liabilities and Capital	78,186,257	85,573,363
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member]
ASSETS
Cash and cash equivalents	302,492	951,485
U.S. Treasury securities, at fair value	2,026,585	3,126,551
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	5,111,813
Investments in unconsolidated trading companies, at fair value	319,038	4,292,075
Interest receivable	13,648	64,446
Total Assets	7,773,576	8,434,557
LIABILITIES
Owner redemptions payable
Management fees payable to Managing Owner		42,705
Interest payable to Managing Owner	5,504	8,124
Service fees payable to Managing Owner	13,888	17,803
Trading fees payable to Managing Owner	19,141	24,353
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	142,468	133,281
Subscriptions payable to private investment companies	105,800
Other liabilities	23,946
Total Liabilities	310,747	226,266
CAPITAL
Total Owners' Capital	7,462,829	8,208,291
Non-Controlling Interests
Total Capital	7,462,829	8,208,291
Total Liabilities and Capital	7,773,576	8,434,557
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 7,018,056	$ 7,755,444
Units Outstanding	51,477	58,946
Net Asset Value per Unit	$ 136.34	$ 131.57
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 84,363	$ 107,598
Limited Owner Units	$ 326,919	$ 313,167
Units Outstanding	2,104	2,248
Net Asset Value per Unit	$ 195.47	$ 187.17
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 33,491	$ 32,082
Units Outstanding	214	214
Net Asset Value per Unit	$ 156.50	$ 149.92
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
ASSETS
Cash and cash equivalents	$ 26,556	$ 135,096
U.S. Treasury securities, at fair value	177,918	443,921
Incentive fees receivable	697	697
Swap contracts, at fair value	2,905,249	2,955,444
Investments in private investment companies, at fair value	3,193,772	2,167,879
Investments in unconsolidated trading companies, at fair value	31,388	726,686
Interest receivable	1,198	9,150
Total Assets	6,336,778	6,438,873
LIABILITIES
Owner redemptions payable	14,345
Management fees payable to Managing Owner		9,201
Interest payable to Managing Owner	619	1,238
Service fees payable to Managing Owner	6,058	6,684
Trading fees payable to Managing Owner	11,257	10,189
Advance on unrealized Swap Appreciation	1,900,000	1,900,000
Subscriptions in advance for service fee rebates	51,039	46,159
Subscriptions payable to private investment companies
Other liabilities	2,102
Total Liabilities	1,985,420	1,973,471
CAPITAL
Total Owners' Capital	3,863,976	3,953,684
Non-Controlling Interests	487,382	511,718
Total Capital	4,351,358	4,465,402
Total Liabilities and Capital	6,336,778	6,438,873
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 3,246,372	$ 3,331,725
Units Outstanding	32,567	33,374
Net Asset Value per Unit	$ 99.68	$ 99.83
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 39,187	$ 46,961
Limited Owner Units	$ 577,405	$ 573,992
Units Outstanding	4,018	4,071
Net Asset Value per Unit	$ 153.46	$ 152.53
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 1,012	$ 1,006
Units Outstanding	9	9
Net Asset Value per Unit	$ 112.45	$ 111.78
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
ASSETS
Cash and cash equivalents	$ 42,988	$ 37,556
U.S. Treasury securities, at fair value	288,004	123,409
Receivable from futures commission merchants	2,710,063	2,683,299
Open trade equity, at fair value	143,826	220,659
Swap contracts, at fair value	10,599,721	10,794,908
Investments in private investment companies, at fair value	21,038,058	22,854,326
Investments in unconsolidated trading companies, at fair value	73,545	1,744,999
Interest receivable	1,940	2,544
Redemptions receivable from private investment companies	270,647
Other assets	21,484
Total Assets	35,190,276	38,461,700
LIABILITIES
Owner redemptions payable	31,891	23,759
Incentive fees payable to Managing Owner	8,966	13,917
Interest payable to Managing Owner	1,237	1,490
Service fees payable to Managing Owner	47,153	56,791
Trading fees payable to Managing Owner	88,587	101,770
Risk analysis fees payable	9,077	9,127
Advance on unrealized Swap Appreciation	6,176,555	6,176,555
Subscriptions in advance for service fee rebates	283,754	258,194
Other liabilities
Total Liabilities	6,647,220	6,641,603
CAPITAL
Total Owners' Capital	28,543,056	31,820,097
Non-Controlling Interests
Total Capital	28,543,056	31,820,097
Total Liabilities and Capital	35,190,276	38,461,700
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 22,821,736	$ 25,703,922
Units Outstanding	198,633	218,514
Net Asset Value per Unit	$ 114.89	$ 117.63
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 100,257	$ 125,021
Limited Owner Units	$ 4,101,516	$ 4,403,354
Units Outstanding	23,600	25,027
Net Asset Value per Unit	$ 178.04	$ 180.94
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units	$ 211,681	$ 251,097
Limited Owner Units	$ 86,671	$ 88,076
Units Outstanding	1,934	2,163
Net Asset Value per Unit	$ 154.27	$ 156.81
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 3a [Member]
CAPITAL
Limited Owner Units	$ 871,770	$ 893,515
Units Outstanding	5,669	5,718
Net Asset Value per Unit	$ 153.78	$ 156.26
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 349,425	$ 355,112
Units Outstanding	2,647	2,647
Net Asset Value per Unit	$ 132.01	$ 134.16
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
ASSETS
Cash and cash equivalents	$ 14,722	$ 25,072
U.S. Treasury securities, at fair value	98,635	82,386
Receivable from futures commission merchants
Open trade equity, at fair value
Swap contracts, at fair value
Investments in private investment companies, at fair value	3,122,067	3,252,075
Investments in unconsolidated trading companies, at fair value	500,149	523,180
Interest receivable	664	1,698
Redemptions receivable from private investment companies
Other assets
Total Assets	3,736,237	3,884,411
LIABILITIES
Owner redemptions payable	35,604
Incentive fees payable to Managing Owner
Interest payable to Managing Owner	37
Service fees payable to Managing Owner	7,907	8,575
Trading fees payable to Managing Owner	7,483	7,812
Risk analysis fees payable
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	12,874	11,162
Other liabilities	1,166
Total Liabilities	65,071	27,549
CAPITAL
Total Owners' Capital	3,671,166	3,856,862
Non-Controlling Interests
Total Capital	3,671,166	3,856,862
Total Liabilities and Capital	3,736,237	3,884,411
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 3,564,419	$ 3,709,130
Units Outstanding	50,373	51,939
Net Asset Value per Unit	$ 70.76	$ 71.41
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 37,690	$ 46,368
Limited Owner Units	$ 67,164	$ 99,467
Units Outstanding	971	1,348
Net Asset Value per Unit	$ 107.99	$ 108.18
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 3a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1AP [Member]
CAPITAL
Limited Owner Units	$ 1,893	$ 1,897
Units Outstanding	23	23
Net Asset Value per Unit	$ 82.31	$ 82.48
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
ASSETS
Cash and cash equivalents		$ 472,695
U.S. Treasury securities, at fair value		1,553,261
Incentive fees receivable	17,277	17,277
Swap contracts, at fair value	5,833,765	5,920,414
Investments in private investment companies, at fair value	12,345,731	11,084,463
Investments in unconsolidated trading companies, at fair value	19,736	1,160,910
Interest receivable		32,017
Due from Managing Owner	3,199
Redemptions receivable from private investment companies	31,288
Other assets
Total Assets	18,250,996	20,241,037
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner		3,875
Service fees payable to Managing Owner	2,490	4,498
Trading fees payable to Managing Owner	42,268	44,827
Advance on unrealized Swap Appreciation	4,000,000	4,000,000
Subscriptions in advance for service fee rebates	26,419	20,430
Other liabilities	2,664
Total Liabilities	4,073,841	4,084,527
CAPITAL
Total Owners' Capital	14,177,155	16,156,510
Non-Controlling Interests
Total Capital	14,177,155	16,156,510
Total Liabilities and Capital	18,250,996	20,241,037
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 1,583,757	$ 1,703,556
Units Outstanding	15,706	16,661
Net Asset Value per Unit	$ 100.84	$ 102.25
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 2,976	$ 3,005
Limited Owner Units	$ 6,163,896	$ 7,669,749
Units Outstanding	51,524	63,494
Net Asset Value per Unit	$ 119.69	$ 120.84
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units	$ 156,703	$ 172,426
Limited Owner Units	$ 6,269,823	$ 6,607,774
Units Outstanding	57,576	60,202
Net Asset Value per Unit	$ 111.61	$ 112.62
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
ASSETS
Cash and cash equivalents	$ 4,634	$ 46,374
U.S. Treasury securities, at fair value	31,044	152,384
Incentive fees receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	4,997,050	4,661,327
Investments in unconsolidated trading companies, at fair value	15,106	775,088
Interest receivable	209	3,141
Due from Managing Owner	528
Redemptions receivable from private investment companies	56,644
Other assets
Total Assets	5,105,215	5,638,314
LIABILITIES
Owner redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner		8,347
Service fees payable to Managing Owner	1,287	1,750
Trading fees payable to Managing Owner	23,323	27,984
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	31,999	28,100
Other liabilities	367
Total Liabilities	56,976	66,181
CAPITAL
Total Owners' Capital	5,048,239	5,572,133
Non-Controlling Interests
Total Capital	5,048,239	5,572,133
Total Liabilities and Capital	5,105,215	5,638,314
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units	$ 1,437,087	$ 1,484,478
Units Outstanding	16,296	16,296
Net Asset Value per Unit	$ 88.19	$ 91.10
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 33,334	$ 51,365
Limited Owner Units	$ 1,120,644	$ 1,241,610
Units Outstanding	11,023	12,008
Net Asset Value per Unit	$ 104.69	$ 107.68
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units	$ 19,476	$ 20,019
Limited Owner Units	$ 2,437,698	$ 2,774,661
Units Outstanding	25,064	27,734
Net Asset Value per Unit	$ 98.04	$ 100.77
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
ASSETS
Cash and cash equivalents	$ 27,591	$ 61,600
U.S. Treasury securities, at fair value	184,850	202,415
Incentive fees receivable	60,871	60,871
Swap contracts, at fair value	461,666	479,102
Investments in private investment companies, at fair value	1,500,814	1,729,241
Investments in unconsolidated trading companies, at fair value	23,927	28,163
Interest receivable	1,245	4,172
Due from Managing Owner
Redemptions receivable from private investment companies
Other assets	1,503
Total Assets	2,262,467	2,565,564
LIABILITIES
Owner redemptions payable	7,855
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Service fees payable to Managing Owner	7	51
Trading fees payable to Managing Owner	4,103	5,306
Advance on unrealized Swap Appreciation	115,000	115,000
Subscriptions in advance for service fee rebates	143
Other liabilities
Total Liabilities	127,108	120,357
CAPITAL
Total Owners' Capital	2,135,359	2,445,207
Non-Controlling Interests
Total Capital	2,135,359	2,445,207
Total Liabilities and Capital	2,262,467	2,565,564
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1 [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Net Asset Value per Unit
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
CAPITAL
Limited Owner Units	$ 17,701	$ 20,051
Units Outstanding	353	353
Net Asset Value per Unit	$ 50.14	$ 56.80
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
CAPITAL
Managing Owner Units	$ 5,196	$ 5,998
Limited Owner Units	$ 66,177	$ 78,098
Units Outstanding	762	851
Net Asset Value per Unit	$ 93.67	$ 98.82
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
CAPITAL
Managing Owner Units	$ 15,324	$ 20,484
Limited Owner Units	$ 90,688	$ 165,985
Units Outstanding	1,798	2,803
Net Asset Value per Unit	$ 58.96	$ 66.52
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
CAPITAL
Managing Owner Units
Limited Owner Units	$ 1,640,170	$ 1,791,417
Units Outstanding	16,694	17,282
Net Asset Value per Unit	$ 98.25	$ 103.66
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
CAPITAL
Managing Owner Units	$ 1,111	$ 1,253
Limited Owner Units	$ 298,992	$ 361,921
Units Outstanding	4,844	5,201
Net Asset Value per Unit	$ 61.96	$ 69.83

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Condensed Schedule of Investments (Unaudited)	Mar. 31, 2019 USD ($)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Investment Owned, Fair Value	$ 5,833,765	[1]
Investment Owned, % of Total Capital (Net Asset Value)	41.15%	[1]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 5,833,765	[1]
Investment Owned, % of Total Capital (Net Asset Value)	41.15%	[1]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 12,345,731	[2]
Investment Owned, % of Total Capital (Net Asset Value)	87.07%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	$ 1,314,756	[2]
Investment Owned, % of Total Capital (Net Asset Value)	9.27%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	$ 1,254,558	[2]
Investment Owned, % of Total Capital (Net Asset Value)	8.85%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	$ 2,433,367	[2]
Investment Owned, % of Total Capital (Net Asset Value)	17.16%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	$ 1,579,744	[2]
Investment Owned, % of Total Capital (Net Asset Value)	11.14%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	$ 171,906	[2]
Investment Owned, % of Total Capital (Net Asset Value)	1.21%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	$ 528,218	[2]
Investment Owned, % of Total Capital (Net Asset Value)	3.73%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 1,880,972	[2]
Investment Owned, % of Total Capital (Net Asset Value)	13.27%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 3,056,166	[2]
Investment Owned, % of Total Capital (Net Asset Value)	21.56%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	$ 126,044	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.89%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 19,736	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.14%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	$ 19,736	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.14%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value		[3]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[3]
Investment Owned, Underlying Face Amount, at Face Value		[3]
Investment Owned, at Cost		[3]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		[3]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[3]
Investment Owned, Underlying Face Amount, at Face Value		[3]
Investment Owned, at Cost		[3]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 4,997,050	[2]
Investment Owned, % of Total Capital (Net Asset Value)	98.99%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	$ 786,972	[2]
Investment Owned, % of Total Capital (Net Asset Value)	15.59%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 1,186,544	[2]
Investment Owned, % of Total Capital (Net Asset Value)	23.50%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 1,900,912	[2]
Investment Owned, % of Total Capital (Net Asset Value)	37.65%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	$ 1,122,622	[2]
Investment Owned, % of Total Capital (Net Asset Value)	22.24%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 15,106	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.30%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 4,018	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.08%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	$ 11,088	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.20%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 31,044	[3]
Investment Owned, % of Total Capital (Net Asset Value)	0.61%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 24,464	[3]
Investment Owned, at Cost	30,628	[3]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 31,044	[3]
Investment Owned, % of Total Capital (Net Asset Value)	0.61%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 24,464	[3]
Investment Owned, at Cost	30,628	[3]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Investment Owned, Fair Value	$ 461,666	[1]
Investment Owned, % of Total Capital (Net Asset Value)	21.62%	[1]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 461,666	[1]
Investment Owned, % of Total Capital (Net Asset Value)	21.62%	[1]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 1,500,814	[2]
Investment Owned, % of Total Capital (Net Asset Value)	70.28%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	$ 264,208	[2]
Investment Owned, % of Total Capital (Net Asset Value)	12.37%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 705,117	[2]
Investment Owned, % of Total Capital (Net Asset Value)	33.02%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 23,927	[2]
Investment Owned, % of Total Capital (Net Asset Value)	1.12%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 23,927	[2]
Investment Owned, % of Total Capital (Net Asset Value)	1.12%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 184,850	[3]
Investment Owned, % of Total Capital (Net Asset Value)	8.66%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 145,666	[3]
Investment Owned, at Cost	182,373	[3]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 184,850	[3]
Investment Owned, % of Total Capital (Net Asset Value)	8.66%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 145,666	[3]
Investment Owned, at Cost	182,373	[3]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 21,038,058	[2]
Investment Owned, % of Total Capital (Net Asset Value)	73.70%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	$ 2,395,043	[2]
Investment Owned, % of Total Capital (Net Asset Value)	8.39%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	$ 2,008,090	[2]
Investment Owned, % of Total Capital (Net Asset Value)	7.04%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	$ 4,093,087	[2]
Investment Owned, % of Total Capital (Net Asset Value)	14.34%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	$ 2,675,584	[2]
Investment Owned, % of Total Capital (Net Asset Value)	9.37%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	$ 380,111	[2]
Investment Owned, % of Total Capital (Net Asset Value)	1.33%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	$ 490,758	[2]
Investment Owned, % of Total Capital (Net Asset Value)	1.72%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 3,231,600	[2]
Investment Owned, % of Total Capital (Net Asset Value)	11.32%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 5,511,498	[2]
Investment Owned, % of Total Capital (Net Asset Value)	19.31%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	$ 252,287	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.88%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 73,545	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.27%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 37,279	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.13%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	$ 36,266	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.13%	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 288,004	[3]
Investment Owned, % of Total Capital (Net Asset Value)	1.01%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 226,953	[3]
Investment Owned, at Cost	284,145	[3]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 288,004	[3]
Investment Owned, % of Total Capital (Net Asset Value)	1.01%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 226,953	[3]
Investment Owned, at Cost	284,145	[3]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	$ 186,968	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.67%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ (7,220)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	(3.00%)	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ (187)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	$ 16,967	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.06%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 70,828	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.25%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	$ 20,289	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.07%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	$ 47,651	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.17%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 27,031	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.09%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 3,200	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.01%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 5,687	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.02%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	$ (248)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,970	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.01%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	$ 27,518	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.09%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 10,850	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.04%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ (3,294)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	(0.01%)	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 14,425	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.05%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 407	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,780	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.01%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,350	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.01%	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	$ (70,660)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	(25.00%)	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	$ (70,660)	[4]
Investment Owned, % of Total Capital (Net Asset Value)	(0.25%)	[4]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	$ 143,826	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.50%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member]
Investment Owned, Fair Value	$ 10,599,721	[1]
Investment Owned, % of Total Capital (Net Asset Value)	37.14%	[1]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 10,599,721	[1]
Investment Owned, % of Total Capital (Net Asset Value)	37.14%	[1]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 3,122,067	[2]
Investment Owned, % of Total Capital (Net Asset Value)	85.04%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 1,628,058	[2]
Investment Owned, % of Total Capital (Net Asset Value)	44.35%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	$ 1,494,009	[2]
Investment Owned, % of Total Capital (Net Asset Value)	40.70%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 500,149	[2]
Investment Owned, % of Total Capital (Net Asset Value)	13.63%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 12,767	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.35%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value		[2]
Investment Owned, % of Total Capital (Net Asset Value)		[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value	$ 487,382	[2]
Investment Owned, % of Total Capital (Net Asset Value)	13.28%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 98,635	[3]
Investment Owned, % of Total Capital (Net Asset Value)	2.69%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 77,726	[3]
Investment Owned, at Cost	97,314	[3]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 98,635	[3]
Investment Owned, % of Total Capital (Net Asset Value)	2.69%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 77,726	[3]
Investment Owned, at Cost	97,314	[3]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value		[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Swap [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value		[1]
Investment Owned, % of Total Capital (Net Asset Value)		[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 5,111,813	[3]
Investment Owned, % of Total Capital (Net Asset Value)	68.50%	[3]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 5,111,813	[3]
Investment Owned, % of Total Capital (Net Asset Value)	68.50%	[3]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		[3]
Investment Owned, % of Total Capital (Net Asset Value)		[3]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 319,038	[2]
Investment Owned, % of Total Capital (Net Asset Value)	4.27%	[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 262,317	[2]
Investment Owned, % of Total Capital (Net Asset Value)	3.51%	[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	$ 56,721	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.76%	[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 2,026,585	[3]
Investment Owned, % of Total Capital (Net Asset Value)	27.16%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 1,596,989	[3]
Investment Owned, at Cost	1,999,429	[3]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 2,026,585	[3]
Investment Owned, % of Total Capital (Net Asset Value)	27.16%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 1,596,989	[3]
Investment Owned, at Cost	1,999,429	[3]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Investment Owned, Fair Value	$ 2,905,249	[1]
Investment Owned, % of Total Capital (Net Asset Value)	66.77%	[1]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	$ 2,905,249	[1]
Investment Owned, % of Total Capital (Net Asset Value)	66.77%	[1]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 3,193,772	[3]
Investment Owned, % of Total Capital (Net Asset Value)	73.40%	[3]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 1,185,833	[3]
Investment Owned, % of Total Capital (Net Asset Value)	27.25%	[3]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 2,007,939	[3]
Investment Owned, % of Total Capital (Net Asset Value)	46.15%	[3]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	$ 31,389	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.72%	[2]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	$ 23,029	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.53%	[2]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	$ 8,360	[2]
Investment Owned, % of Total Capital (Net Asset Value)	0.19%	[2]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 177,918	[3]
Investment Owned, % of Total Capital (Net Asset Value)	4.09%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 140,203	[3]
Investment Owned, at Cost	175,534	[3]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 177,918	[3]
Investment Owned, % of Total Capital (Net Asset Value)	4.09%	[3]
Investment Owned, Underlying Face Amount, at Face Value	$ 140,203	[3]
Investment Owned, at Cost	175,534	[3]
Frontier Funds [Member] | Swap [Member]
Investment Owned, Fair Value	$ 19,800,401	[5]
Investment Owned, % of Total Capital (Net Asset Value)	30.51%	[5]
Frontier Funds [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 5,833,765	[5]
Investment Owned, % of Total Capital (Net Asset Value)	8.99%	[5]
Frontier Funds [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 461,666	[5]
Investment Owned, % of Total Capital (Net Asset Value)	0.71%	[5]
Frontier Funds [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	$ 10,599,720	[5]
Investment Owned, % of Total Capital (Net Asset Value)	16.33%	[5]
Frontier Funds [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	$ 2,905,250	[5]
Investment Owned, % of Total Capital (Net Asset Value)	4.48%	[5]
Frontier Funds [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	$ 51,672,642	[6]
Investment Owned, % of Total Capital (Net Asset Value)	79.60%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	$ 4,760,979	[6]
Investment Owned, % of Total Capital (Net Asset Value)	7.33%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	$ 3,262,648	[6]
Investment Owned, % of Total Capital (Net Asset Value)	5.03%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	$ 6,526,454	[6]
Investment Owned, % of Total Capital (Net Asset Value)	10.05%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	$ 4,255,328	[6]
Investment Owned, % of Total Capital (Net Asset Value)	6.56%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	$ 552,017	[6]
Investment Owned, % of Total Capital (Net Asset Value)	0.85%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	$ 12,596,762	[6]
Investment Owned, % of Total Capital (Net Asset Value)	19.41%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	$ 14,809,691	[6]
Investment Owned, % of Total Capital (Net Asset Value)	22.81%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	$ 2,616,631	[6]
Investment Owned, % of Total Capital (Net Asset Value)	4.03%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	$ 909,820	[6]
Investment Owned, % of Total Capital (Net Asset Value)	1.40%	[6]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Investment Owned, Fair Value	$ 363,336	[6]
Investment Owned, % of Total Capital (Net Asset Value)	0.56%	[6]
Frontier Funds [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	$ 2,807,036
Investment Owned, % of Total Capital (Net Asset Value)	4.32%
Frontier Funds [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	$ 2,807,036
Investment Owned, % of Total Capital (Net Asset Value)	4.32%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	$ 231,003	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.35%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ (7,220)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	(0.01%)	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	$ 16,967	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.03%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 70,828	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.11%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	$ 20,289	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.03%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	$ 47,651	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.07%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 27,031	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.04%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 3,200	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 5,687	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.01%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	$ (248)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,920	[4]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[4]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 43,848	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.07%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	$ (24,367)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	(0.05%)	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 10,850	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.02%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ (55,178)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	(0.09%)	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ (1)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 14,425	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.02%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	$ 407	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,780	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	$ 2,350	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.00%	[7]
Frontier Funds [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	$ (70,658)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	(0.11%)	[7]
Frontier Funds [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	$ (70,658)	[7]
Investment Owned, % of Total Capital (Net Asset Value)	(0.11%)	[7]
Frontier Funds [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	$ 135,976	[7]
Investment Owned, % of Total Capital (Net Asset Value)	0.19%	[7]

[1] See Note 4 to the Financial Statements.

[2] See Note 5 to the Financial Statements.

[3] See Note 2 to the Financial Statements.

[4] Except for those items disclosed, no individual futures, or forwards position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.

[5] See Notes to Consolidated Financial Statements, Note 4.

[6] See Notes to Consolidated Financial Statements, Note 5.

[7] Except for those items disclosed, no individual futures, forwards and option on futures contract position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.

XML

Condensed Schedule of Investments (Dec. 2018) - USD ($)		Mar. 31, 2019		Dec. 31, 2018
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 5,833,765		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[1]	41.15%		36.64%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 5,833,765		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[1]	41.15%		36.64%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 12,345,731		$ 11,084,463
Investment Owned, % of Total Capital (Net Asset Value)	[2]	87.07%		68.60%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,314,756		$ 855,522
Investment Owned, % of Total Capital (Net Asset Value)	[2]	9.27%		5.30%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,254,558		$ 1,150,943
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.85%		7.12%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]	$ 2,433,367		$ 1,789,814
Investment Owned, % of Total Capital (Net Asset Value)	[2]	17.16%		11.08%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,579,744		$ 1,517,376
Investment Owned, % of Total Capital (Net Asset Value)	[2]	11.14%		9.39%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[2]	$ 171,906		$ 1,650,526
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.21%		10.22%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]	$ 528,218		$ 446,649
Investment Owned, % of Total Capital (Net Asset Value)	[2]	3.73%		2.76%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,880,972		$ 300,708
Investment Owned, % of Total Capital (Net Asset Value)	[2]	13.27%		1.86%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 3,056,166		$ 3,266,499
Investment Owned, % of Total Capital (Net Asset Value)	[2]	21.56%		20.22%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]	$ 126,044		$ 106,426
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.89%		0.66%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 19,736		$ 1,160,910
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.14%		7.19%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]			$ 216,107
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%		1.34%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]	$ 19,736		$ 944,803
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.14%		5.85%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]			$ 1,553,261
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		9.61%
Investment Owned, Underlying Face Amount, at Face Value			[3]	$ 1,232,919
Investment Owned, at Cost			[3]	1,527,337
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]			$ 1,553,261
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		9.61%
Investment Owned, Underlying Face Amount, at Face Value	[3]			$ 1,232,919
Investment Owned, at Cost	[3]			1,527,337
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 4,997,050		$ 4,661,327
Investment Owned, % of Total Capital (Net Asset Value)	[2]	98.99%		83.65%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 786,972		$ 695,585
Investment Owned, % of Total Capital (Net Asset Value)	[2]	15.59%		12.48%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,186,544
Investment Owned, % of Total Capital (Net Asset Value)	[2]	23.50%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,900,912		$ 2,667,361
Investment Owned, % of Total Capital (Net Asset Value)	[2]	37.65%		47.87%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,122,622		$ 1,298,381
Investment Owned, % of Total Capital (Net Asset Value)	[2]	22.24%		23.30%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 15,106		$ 775,088
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.30%		13.91%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 4,018		$ 21,201
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.08%		0.38%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]	$ 11,088		$ 753,887
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.20%		13.53%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 31,044		$ 152,384
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.61%		2.73%
Investment Owned, Underlying Face Amount, at Face Value		$ 24,464	[3]	$ 120,957
Investment Owned, at Cost		30,628	[3]	149,841
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 31,044		$ 152,384
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.61%		2.73%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 24,464		$ 120,957
Investment Owned, at Cost	[3]	30,628		149,841
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 461,666		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[1]	21.62%		19.59%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 461,666		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[1]	21.62%		19.59%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 1,500,814		$ 1,729,241
Investment Owned, % of Total Capital (Net Asset Value)	[2]	70.28%		70.72%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 264,208		$ 230,848
Investment Owned, % of Total Capital (Net Asset Value)	[2]	12.37%		9.44%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 705,117		$ 887,952
Investment Owned, % of Total Capital (Net Asset Value)	[2]	33.02%		36.31%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]			$ 610,441
Investment Owned, % of Total Capital (Net Asset Value)	[2]			24.96%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 23,927		$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.12%		1.15%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 23,927		$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.12%		1.15%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 184,850		$ 202,415
Investment Owned, % of Total Capital (Net Asset Value)	[3]	8.66%		8.28%
Investment Owned, Underlying Face Amount, at Face Value		$ 145,666	[3]	$ 160,669
Investment Owned, at Cost		182,373	[3]	199,037
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 184,850		$ 202,415
Investment Owned, % of Total Capital (Net Asset Value)	[3]	8.66%		8.28%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 145,666		$ 160,669
Investment Owned, at Cost	[3]	182,373		199,037
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]			$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)	[1]			33.92%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]			$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)	[1]			33.92%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 21,038,058		$ 22,854,326
Investment Owned, % of Total Capital (Net Asset Value)	[2]	73.70%		71.81%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 2,395,043		$ 1,526,456
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.39%		4.80%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]	$ 2,008,090		$ 1,852,304
Investment Owned, % of Total Capital (Net Asset Value)	[2]	7.04%		5.82%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]	$ 4,093,087		$ 3,191,189
Investment Owned, % of Total Capital (Net Asset Value)	[2]	14.34%		10.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]	$ 2,675,584		$ 3,451,307
Investment Owned, % of Total Capital (Net Asset Value)	[2]	9.37%		10.85%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[2]	$ 380,111		$ 3,853,295
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.33%		12.11%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]	$ 490,758		$ 484,157
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.72%		1.52%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 3,231,600		$ 802,570
Investment Owned, % of Total Capital (Net Asset Value)	[2]	11.32%		2.52%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 5,511,498		$ 7,426,768
Investment Owned, % of Total Capital (Net Asset Value)	[2]	19.31%		23.34%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]	$ 252,287		$ 266,280
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.88%		0.84%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 73,545		$ 1,744,999
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.27%		5.49%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 37,279		$ 34,422
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.13%		0.11%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]	$ 36,266		$ 1,710,577
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.13%		5.38%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 288,004		$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.01%		0.39%
Investment Owned, Underlying Face Amount, at Face Value		$ 226,953	[3]	$ 97,958
Investment Owned, at Cost		284,145	[3]	121,350
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 288,004		$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.01%		0.39%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 226,953		$ 97,958
Investment Owned, at Cost	[3]	284,145		121,350
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[4]	$ 186,968		$ 158,944
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.67%		0.51%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]			$ (1,472)
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ (7,220)		$ 8,490
Investment Owned, % of Total Capital (Net Asset Value)	[4]	(3.00%)		0.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ (187)		$ (31,117)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		(0.10%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]			$ (5,390)
Investment Owned, % of Total Capital (Net Asset Value)	[4]			(0.02%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]	$ 16,967		$ 7,402
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.06%		0.02%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]	$ 70,828		$ 116,653
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.25%		0.37%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[4]	$ 20,289		$ 17,226
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.07%		0.05%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[4]	$ 47,651		$ 48,083
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.17%		0.15%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 27,031		$ 1,094
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.09%		0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 3,200		$ (2,025)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.01%		(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]	$ 5,687
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.02%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 2,970
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.01%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[4]	$ (248)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[4]	$ 27,518		$ 83,916
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.09%		0.25%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]	$ 407
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 10,850		$ 6,120
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.04%		0.02%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ (3,294)		$ 28,880
Investment Owned, % of Total Capital (Net Asset Value)	[4]	(0.01%)		0.09%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 2,780		$ (600)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.01%		0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 14,425		$ 25,227
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.05%		0.08%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]			$ 9,613
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 2,350		$ (1,305)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.01%		0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]			$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.01%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]			$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.04%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]			$ 128
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[4]	$ (70,660)		$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	(25.00%)		(0.07%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	[4]	$ (70,660)		$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	(0.25%)		(0.07%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[4]	$ 143,826		$ 220,659
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.50%		0.69%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 10,599,721
Investment Owned, % of Total Capital (Net Asset Value)	[1]	37.14%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 10,599,721
Investment Owned, % of Total Capital (Net Asset Value)	[1]	37.14%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 3,122,067		$ 3,252,075
Investment Owned, % of Total Capital (Net Asset Value)	[2]	85.04%		84.32%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,628,058		$ 1,954,531
Investment Owned, % of Total Capital (Net Asset Value)	[2]	44.35%		50.68%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,494,009		$ 1,297,544
Investment Owned, % of Total Capital (Net Asset Value)	[2]	40.70%		33.64%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 500,149		$ 523,180
Investment Owned, % of Total Capital (Net Asset Value)	[2]	13.63%		13.57%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 12,767		$ 11,463
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.35%		0.30%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value	[2]	$ 487,382		$ 511,717
Investment Owned, % of Total Capital (Net Asset Value)	[2]	13.28%		13.27%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 98,635		$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)	[3]	2.69%		2.14%
Investment Owned, Underlying Face Amount, at Face Value		$ 77,726	[3]	$ 65,395
Investment Owned, at Cost		97,314	[3]	81,011
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 98,635		$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)	[3]	2.69%		2.14%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 77,726		$ 65,395
Investment Owned, at Cost	[3]	97,314		81,011
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Canada) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 5,111,813	[3]		[2]
Investment Owned, % of Total Capital (Net Asset Value)		68.50%	[3]		[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[3]	$ 5,111,813
Investment Owned, % of Total Capital (Net Asset Value)	[3]	68.50%
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value			[3]		[2]
Investment Owned, % of Total Capital (Net Asset Value)			[3]		[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 319,038		$ 4,292,075
Investment Owned, % of Total Capital (Net Asset Value)	[2]	4.27%		52.29%
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 262,317		$ 435,000
Investment Owned, % of Total Capital (Net Asset Value)	[2]	3.51%		5.30%
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]	$ 56,721		$ 3,857,075
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.76%		46.99%
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 2,026,585		$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)	[3]	27.16%		38.09%
Investment Owned, Underlying Face Amount, at Face Value		$ 1,596,989	[3]	$ 2,481,736
Investment Owned, at Cost		1,999,429	[3]	3,074,369
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 2,026,585		$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)	[3]	27.16%		38.09%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 1,596,989		$ 2,481,736
Investment Owned, at Cost	[3]	1,999,429		3,074,369
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 2,905,249		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[1]	66.77%		66.19%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 2,905,249		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[1]	66.77%		66.19%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 3,193,772	[3]	$ 2,167,879	[2]
Investment Owned, % of Total Capital (Net Asset Value)		73.40%	[3]	48.55%	[2]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[3]	$ 1,185,833
Investment Owned, % of Total Capital (Net Asset Value)	[3]	27.25%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 2,007,939	[3]	$ 2,167,879	[2]
Investment Owned, % of Total Capital (Net Asset Value)		46.15%	[3]	48.55%	[2]
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 31,389		$ 726,686
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.72%		16.27%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 23,029		$ 61,763
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.53%		1.38%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]	$ 8,360		$ 664,923
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.19%		14.89%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 177,918		$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)	[3]	4.09%		9.94%
Investment Owned, Underlying Face Amount, at Face Value		$ 140,203	[3]	$ 352,367
Investment Owned, at Cost		175,534	[3]	436,512
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 177,918		$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)	[3]	4.09%		9.94%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 140,203		$ 352,367
Investment Owned, at Cost	[3]	175,534		436,512
Frontier Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[5]	$ 19,800,401		$ 20,149,868
Investment Owned, % of Total Capital (Net Asset Value)	[5]	30.51%		27.98%
Frontier Fund [Member] | Swap [Member] | Frontier XXXV Diversified select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 5,833,765		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[5]	8.99%		8.22%
Frontier Fund [Member] | Swap [Member] | Frontier XXXVII L/S select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 461,666		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.71%		0.67%
Frontier Fund [Member] | Swap [Member] | Frontier XXXIV Balanced select swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 10,599,720		$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)	[5]	16.33%		14.99%
Frontier Fund [Member] | Swap [Member] | Frontier Brevan Howard swap (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 2,905,250		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[5]	4.48%		4.10%
Frontier Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[6]	$ 51,672,642		$ 46,557,428
Investment Owned, % of Total Capital (Net Asset Value)	[6]	79.60%		64.64%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[6]	$ 4,760,979		$ 3,308,411
Investment Owned, % of Total Capital (Net Asset Value)	[6]	7.33%		4.59%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[6]	$ 3,262,648		$ 3,003,247
Investment Owned, % of Total Capital (Net Asset Value)	[6]	5.03%		4.17%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[6]	$ 6,526,454		$ 4,981,003
Investment Owned, % of Total Capital (Net Asset Value)	[6]	10.05%		6.92%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[6]	$ 4,255,328		$ 4,968,683
Investment Owned, % of Total Capital (Net Asset Value)	[6]	6.56%		6.90%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[6]	$ 552,017		$ 5,503,821
Investment Owned, % of Total Capital (Net Asset Value)	[6]	0.85%		7.64%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[6]			$ 930,806
Investment Owned, % of Total Capital (Net Asset Value)	[6]			1.29%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[6]	$ 12,596,762		$ 1,103,278
Investment Owned, % of Total Capital (Net Asset Value)	[6]	19.41%		1.53%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[6]	$ 14,809,691		$ 18,370,991
Investment Owned, % of Total Capital (Net Asset Value)	[6]	22.81%		25.51%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[6]	$ 2,616,631		$ 2,595,925
Investment Owned, % of Total Capital (Net Asset Value)	[6]	4.03%		3.60%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[6]	$ 909,820		$ 983,147
Investment Owned, % of Total Capital (Net Asset Value)	[6]	1.40%		1.37%
Frontier Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Investment Owned, Fair Value	[6]	$ 363,336		$ 808,116
Investment Owned, % of Total Capital (Net Asset Value)	[6]	0.56%		1.12%
Frontier Fund [Member] | U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 2,807,036		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		4.32%		7.89%
Frontier Fund [Member] | U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 2,807,036		$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)		4.32%		7.89%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[7]	$ 231,003		$ 611,366
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.35%		(0.85%)
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ (1,315)
Investment Owned, % of Total Capital (Net Asset Value)	[4]			0.00%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (7,220)		$ 9,510
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.01%)		0.01%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 429,385
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.60%)
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ (643,321)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.89%)
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Canada) [Member]
Investment Owned, Fair Value	[7]	$ 16,967		$ 13,487
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.03%		0.02%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ 70,828		$ 360,817
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.11%		0.50%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]	$ 20,289		$ 36,092
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.03%		0.50%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]	$ 47,651		$ 78,270
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.07%		0.11%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 27,031		$ 44,250
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.04%		0.06%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 3,200		$ (20,705)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		(0.03%)
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 14,730
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.02%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ 5,687		$ (18,456)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.01%		(0.03%)
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 2,920	[4]	$ (75,392)	[7]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	(0.10%)	[7]
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various currency futures contracts (Latin America) [Member]
Investment Owned, Fair Value	[7]			$ 42,160
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.06%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ (23,446)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.03%
Frontier Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]	$ (248)		$ 1,338
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		0.00%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[7]	$ (24,367)		$ 210,570
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.05%)		0.29%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ 407		$ 400
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		0.00%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 10,850		$ 81,243
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.02%		0.11%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ (55,178)		$ 147,521
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.09%)		0.20%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 2,780		$ 425,052
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		0.59%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]	$ (1)		$ (79,801)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		(0.11%)
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]			$ (309)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ (35,688)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.05%)
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various soft futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 14,425		$ 22,291
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.02%		0.03%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (Canada) [Member]
Investment Owned, Fair Value	[7]			$ 9,817
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.01%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]	$ 2,350		$ (226,300)
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.00%		(0.31%)
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Canada) [Member]
Investment Owned, Fair Value	[7]			$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.02%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[7]			$ 62,711
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.09%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ 283
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various currency futures contracts (Europe) [Member]
Investment Owned, Fair Value	[7]			$ (63,875)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.09%)
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various currency futures contracts (Far East) [Member]
Investment Owned, Fair Value	[7]			$ (180,813)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.25%)
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various currency futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[7]			$ 33,405
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.05%
Frontier Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Africa) [Member]
Investment Owned, Fair Value	[7]			$ (1,220)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			0.00%
Frontier Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[7]	$ (70,658)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.11%)		0.00%
Frontier Fund [Member] | CURRENCY FORWARDS [Member] | Various currency forwards contracts (NA) [Member]
Investment Owned, Fair Value	[7]	$ (70,658)		$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[7]	(0.11%)		0.00%
Frontier Fund [Member] | CURRENCY FORWARDS [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[7]			$ (398,189)
Investment Owned, % of Total Capital (Net Asset Value)	[7]			(0.56%)
Frontier Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[7]	$ 135,976
Investment Owned, % of Total Capital (Net Asset Value)	[7]	0.19%

[1] See Note 4 to the Financial Statements.

[2] See Note 5 to the Financial Statements.

[3] See Note 2 to the Financial Statements.

[4] Except for those items disclosed, no individual futures, or forwards position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.

[5] See Notes to Consolidated Financial Statements, Note 4.

[6] See Notes to Consolidated Financial Statements, Note 5.

[7] Except for those items disclosed, no individual futures, forwards and option on futures contract position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.

XML

Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Frontier Funds [Member]
Investment income:
Interest - net	$ 44,172	$ 60,326
Total Income	44,172	60,326
Expenses:
Incentive Fees (rebate)		148,409
Management Fees	51,677	230,889
Service Fees - Class 1, 1A, 2, 2A	291,355	465,780
Risk analysis Fees	6,692	22,798
Trading Fees	583,251	870,525
Total Expenses	932,975	1,738,401
Investment (loss) - net	(888,803)	(1,678,075)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	(1,277,349)	(754,751)
Net unrealized gain/(loss) on private investment companies	2,834,733	(9,139,562)
Net realized gain/(loss) on private investment companies	(1,920,406)	844,793
Net change in open trade equity/(deficit)	525,552	(763,917)
Net unrealized gain/(loss) on swap contracts	(349,464)	1,532,308
Net realized gain/(loss) on U.S. Treasury securities	103,338	(288,824)
Net unrealized gain/(loss) on U.S. Treasury securities	(85,272)	(13,612)
Trading commissions	(11,073)	(18,998)
Net gain/(loss) on investments	(179,941)	(8,602,563)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(1,068,744)	(10,280,638)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	(1,068,744)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Investment income:
Interest - net	4,868	7,617
Total Income	4,868	7,617
Expenses:
Incentive Fees (rebate)		1,881
Management Fees	2,668	11,563
Service Fees - Class 1, 1A, 2, 2A	12,029	16,115
Trading Fees	130,304	165,150
Total Expenses	145,001	194,709
Investment (loss) - net	(140,133)	(187,092)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	442,738	(1,946,997)
Net realized gain/(loss) on private investment companies	(332,437)	159,265
Net unrealized gain/(loss) on swap contracts	(86,648)	451,993
Net realized gain/(loss) on U.S. Treasury securities	15,071	(23,575)
Net unrealized gain/(loss) on U.S. Treasury securities	(18,038)	(5,937)
Change in fair value of investments in unconsolidated trading companies	(84,498)	(149,643)
Net gain/(loss) on investments	(63,812)	(1,514,894)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(203,945)	(1,701,986)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (203,945)	$ (1,701,986)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (1.41)	$ (9.88)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(1.15)	(10.93)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(1.00)	(10.09)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund
Investment income:
Interest - net	$ 690	$ 8,419
Total Income	690	8,419
Expenses:
Incentive Fees (rebate)
Management Fees	5,593	32,349
Service Fees - Class 1, 1A, 2, 2A	7,486	14,969
Trading Fees	67,318	134,048
Total Expenses	80,397	181,366
Investment (loss) - net	(79,707)	(172,947)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	64,220	(1,342,127)
Net realized gain/(loss) on private investment companies	(103,856)	158,432
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	(1,931)	(29,226)
Net unrealized gain/(loss) on U.S. Treasury securities	3,930	(16,571)
Change in fair value of investments in unconsolidated trading companies	(61,227)	(233,355)
Net gain/(loss) on investments	(98,864)	(1,462,847)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(178,571)	(1,635,794)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (178,571)	$ (1,635,794)
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (2.91)	$ (16.44)
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(2.99)	(18.6)
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(2.73)	(17.29)
The Series of the Frontier Funds [Member] | Frontier Masters Fund | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund
Investment income:
Interest - net	$ 698	$ 4,035
Total Income	698	4,035
Expenses:
Incentive Fees (rebate)
Management Fees
Service Fees - Class 1, 1A, 2, 2A	162	657
Trading Fees	13,852	24,693
Total Expenses	14,014	25,350
Investment (loss) - net	(13,316)	(21,315)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	410,350	(84,865)
Net realized gain/(loss) on private investment companies	(545,569)	(81,438)
Net unrealized gain/(loss) on swap contracts	(17,436)	85,270
Net realized gain/(loss) on U.S. Treasury securities	4,109	(24,986)
Net unrealized gain/(loss) on U.S. Treasury securities	(2,979)	2,568
Change in fair value of investments in unconsolidated trading companies	(560)	58
Net gain/(loss) on investments	(152,085)	(103,393)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(165,401)	(124,708)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (165,401)	$ (124,708)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(6.66)	(3.49)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(5.15)	(3.37)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(7.56)	(3.64)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(5.41)	(3.53)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (7.87)	$ (3.75)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund
Investment income:
Interest - net	$ 11,360	$ 16,516
Total Income	11,360	16,516
Expenses:
Incentive Fees (rebate)		145,134
Management Fees	8,079	20,336
Service Fees - Class 1, 1A, 2, 2A	170,865	262,981
Risk analysis Fees	1,458	1,837
Trading Fees	279,337	384,176
Total Expenses	459,739	814,464
Investment (loss) - net	(448,379)	(797,948)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	4,526	(25,675)
Net unrealized gain/(loss) on private investment companies	903,551	(4,007,917)
Net realized gain/(loss) on private investment companies	(747,334)	297,238
Net change in open trade equity/(deficit)	(102,236)	110,265
Net unrealized gain/(loss) on swap contracts	(195,186)	999,842
Net realized gain/(loss) on U.S. Treasury securities	(3,429)	(23,857)
Net unrealized gain/(loss) on U.S. Treasury securities	14,684	(9,963)
Trading commissions	(7,065)	(7,625)
Change in fair value of investments in unconsolidated trading companies	(138,270)	(239,565)
Net gain/(loss) on investments	(270,759)	(2,907,257)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(719,138)	(3,705,205)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (719,138)	$ (3,705,205)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (2.74)	$ (11.03)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(2.9)	(15.02)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(2.54)	(13.1)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(2.48)	(13.06)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (2.15)	$ (11.24)
The Series of the Frontier Funds [Member] | Frontier Select Fund
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)
Management Fees
Service Fees - Class 1, 1A, 2, 2A	25,505	39,689
Risk analysis Fees
Trading Fees	22,632	37,594
Total Expenses	48,137	77,283
Investment (loss) - net	(48,137)	(77,283)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	82,768	(1,018,761)
Net realized gain/(loss) on private investment companies	(50,950)	138,136
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	3,463	(7,655)
Net unrealized gain/(loss) on U.S. Treasury securities	(2,737)	(12,143)
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(25,473)	5,578
Net gain/(loss) on investments	7,071	(894,845)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(41,066)	(972,128)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (41,066)	$ (972,128)
The Series of the Frontier Funds [Member] | Frontier Select Fund | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.65)	$ (13.8)
The Series of the Frontier Funds [Member] | Frontier Select Fund | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(0.19)	(19.45)
The Series of the Frontier Funds [Member] | Frontier Select Fund | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Select Fund | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Select Fund | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.18)	$ (14.66)
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly, Frontier Winton Fund)
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)
Management Fees	29,148	130,660
Service Fees - Class 1, 1A, 2, 2A	52,123	94,260
Trading Fees	42,715	82,575
Total Expenses	123,986	307,495
Investment (loss) - net	(123,986)	(307,495)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	688,108
Net realized gain/(loss) on private investment companies
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	77,673	(155,025)
Net unrealized gain/(loss) on U.S. Treasury securities	(72,893)	27,490
Change in fair value of investments in unconsolidated trading companies	(328,263)	(899,018)
Net gain/(loss) on investments	364,625	(1,026,553)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	240,639	(1,334,048)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 240,639	$ (1,334,048)
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly, Frontier Winton Fund) | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 4.76	$ (14.48)
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly, Frontier Winton Fund) | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	8.31	(19.65)
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly, Frontier Winton Fund) | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 6.58	$ (14.83)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund
Investment income:
Interest - net
Total Income
Expenses:
Incentive Fees (rebate)		1,394
Management Fees	6,189	35,981
Service Fees - Class 1, 1A, 2, 2A	23,185	37,108
Trading Fees	27,093	42,292
Total Expenses	56,467	116,775
Investment (loss) - net	(56,467)	(116,775)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	140,824	(542,177)
Net realized gain/(loss) on private investment companies	(6,746)	1,707
Net unrealized gain/(loss) on swap contracts	(50,194)	(4,796)
Net realized gain/(loss) on U.S. Treasury securities	8,382	(24,499)
Net unrealized gain/(loss) on U.S. Treasury securities	(7,239)	945
Change in fair value of investments in unconsolidated trading companies	(56,952)	(123,502)
Net gain/(loss) on investments	28,075	(692,322)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(28,392)	(809,097)
Less: Operations attributable to non-controlling interests	(24,336)	(2,326)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (4,056)	$ (806,771)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.15)	$ (16.69)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	0.93	(23.59)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 0.66	$ (17.64)

XML

Consolidated Statements of Changes in Owners' Capital Equity (Unaudited) - 3 months ended Mar. 31, 2019 - USD ($)	Frontier Funds [Member] Managing Owner [Member]	Frontier Funds [Member] Limited Owners [Member]	Frontier Funds [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Managing Owner [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Limited Owners [Member] Class 1 [Member]		The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Limited Owners [Member] Class 3 [Member]		The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Diversified Fund [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Managing Owner [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Limited Owners [Member] Class 1 [Member]		The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Limited Owners [Member] Class 3 [Member]		The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Masters Fund [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Managing Owner [Member] Class 2a [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Managing Owner [Member] Class 3a [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Limited Owners [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Limited Owners [Member] Class 1a [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Limited Owners [Member] Class 2a [Member]		The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Limited Owners [Member] Class 3a [Member]		The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member] Class 3 [Member]	The Series of the Frontier Funds [Member] Frontier Long/Short Commodity Fund [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Managing Owner [Member] Class 2a [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Limited Owners [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Limited Owners [Member] Class 2a [Member]		The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Limited Owners [Member] Class 3a [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Limited Owners [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Balanced Fund [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Limited Owners [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Limited Owners [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Select Fund [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Limited Owners [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Limited Owners [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Global Fund [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Managing Owner [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Limited Owners [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Limited Owners [Member] Class 2 [Member]		The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Limited Owners [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Non-controlling Interest [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Class 1 [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Class 2 [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member] Class 1AP [Member]	The Series of the Frontier Funds [Member] Frontier Heritage Fund [Member]
Owners' Capital, Beginning balance at Dec. 31, 2018	$ 851,595	$ 71,161,187	$ 72,012,782	$ 3,005	$ 172,426	$ 1,703,556		$ 7,669,749		$ 6,607,774						$ 16,156,510	$ 51,365	$ 20,019	$ 1,484,478		$ 1,241,610		$ 2,774,661						$ 5,572,133	$ 5,998	$ 20,484	$ 1,253	$ 78,098		$ 1,791,417	$ 20,051	$ 165,985		$ 361,921						$ 2,445,207	$ 125,021	$ 251,097	$ 25,703,922	$ 4,403,354		$ 88,076		$ 893,515	$ 355,112					$ 31,820,097	$ 46,368	$ 3,709,130	$ 99,467		$ 1,897					$ 3,856,862	$ 107,598	$ 7,755,444	$ 313,167		$ 32,082					$ 8,208,291	$ 46,961	$ 3,331,725	$ 573,992		$ 1,006	$ 511,718				$ 4,465,402
Sale of Units (including transfers)																																																													(106,249)	(38,381)
Redemption of Units (including transfers)	(124,500)	(5,905,855)	(6,030,355)		(14,000)	(37,231)		(1,394,381)		(329,798)						(1,775,410)	(16,000)				(81,053)		(248,270)						(345,323)	(500)	(3,000)		(7,855)		(58,439)		(54,416)		(20,237)						(144,447)	(22,500)	(35,000)	(2,242,725)	(250,099)				(7,579)						(2,557,903)										(144,630)	(26,000)	(960,101)								(986,101)	(7,500)	(78,152)								(85,652)
Operations attributable to non-controlling interests																																																																																					(24,336)				(24,336)
Transfer of Units In(Out)						(57,323)				57,323																																						(24,405)	24,405
Net increase/(decrease) in Owners' Capital resulting from operations attributable to controlling interests	(19,797)	(1,048,947)	(1,068,744)	(29)	(1,723)	(25,245)		(111,472)		(65,476)						(203,945)	(2,031)	(543)	(47,391)		(39,913)		(88,693)						(178,571)	(302)	(2,160)	(142)	(4,066)		(92,808)	(2,350)	(20,881)		(42,692)						(165,401)	(2,264)	(4,416)	(615,056)	(76,144)		(1,405)		(14,166)	(5,687)					(719,138)	(8,678)	(38,462)	6,078		(4)					(41,066)	2,765	222,713	13,752		1,409					240,639	(274)	(7,201)	3,413		6					(4,056)
Owners' Capital, Ending balance at Mar. 31, 2019	$ 707,298	$ 64,206,385	$ 64,913,683	$ 2,976	$ 156,703	$ 1,583,757		$ 6,163,896		$ 6,269,823						$ 14,177,155	$ 33,334	$ 19,476	$ 1,437,087		$ 1,120,644		$ 2,437,698						$ 5,048,239	$ 5,196	$ 15,324	$ 1,111	$ 66,177		$ 1,640,170	$ 17,701	$ 90,688		$ 298,992						$ 2,135,359	$ 100,257	$ 211,681	$ 22,821,736	$ 4,101,516		$ 86,671		$ 871,770	$ 349,425					$ 28,543,056	$ 37,690	$ 3,564,419	$ 67,164		$ 1,893					$ 3,671,166	$ 84,363	$ 7,018,056	$ 326,919		$ 33,491					$ 7,462,829	$ 39,187	$ 3,246,372	$ 577,405		$ 1,012	$ 487,382				$ 4,351,358
Owners' Capital - Units, Beginning balance at Dec. 31, 2018				25	1,531	16,661		63,469		58,671			16,661	63,494	60,202		477	199	16,296		11,532		27,537			16,296	12,008	27,734		61	307	18	790		17,283	352	2,495		5,180				851	17,282		691	1,601	218,514	24,336		562		5,718	2,647		218,514	25,027	2,647		429	51,939	919		23		51,939	1,348	23		575	58,946	1,673		214		58,946	2,248	214		308	33,374	3,763		9		33,374	4,071	9
Owners' Capital - Units, Sale of Units
Owners' Capital - Units, Redemption of Units (including transfers)					(127)	(955)		(11,971)		(2,499)							(159)				(826)		(2,670)							(6)	(47)		(83)		(588)		(958)		(356)							(128)	(229)	(19,880)	(1,299)				(49)								(1,565)	(377)								(144)	(7,469)									(53)	(807)
Owners' Capital - Units, Ending balance at Mar. 31, 2019				25	1,404	15,706		51,498		56,172			15,706	51,524	57,576		318	199	16,296		10,706		24,867			16,296	11,023	25,064		55	260	18	707		16,695	352	1,537		4,824				762	16,694		563	1,372	198,634	23,037		562		5,669	2,647		198,633	23,600	2,647		429	50,374	542		23		50,373	971	23		431	51,477	1,673		214		51,477	2,104	214		255	32,567	3,763		9		32,567	4,018	9
Net asset value per unit, Beginning balance at Dec. 31, 2018						$ 102.25	[1]	$ 120.84	[1]	$ 112.62	[1]								$ 91.10	[1]	$ 107.68	[1]	$ 100.77	[1]									$ 98.82	[1]	$ 103.66	$ 56.80	$ 66.52	[1]	$ 69.83	[1]								$ 117.63	$ 180.94	[1]	$ 156.81	[1]	$ 156.26	$ 134.16							$ 71.41	$ 108.18	[1]	$ 82.48							$ 131.57	$ 187.17	[1]	$ 149.92							$ 99.83	$ 152.53	[1]	$ 111.78
Change in net asset value per unit for the three months ended March 31, 2019						(1.41)		(1.15)		(1.01)									(2.91)		(2.99)		(2.73)										(5.15)		(5.41)	(6.66)	(7.56)		(7.87)									(2.74)	(2.90)		(2.54)		(2.48)	(2.15)							(0.65)	(0.19)		(0.18)							4.76	8.31		6.58							(0.15)	0.93		0.66
Net asset value per unit, Ending balance at Mar. 31, 2019						$ 100.84		$ 119.69		$ 111.62									$ 88.19		$ 104.69		$ 98.04										$ 93.67		$ 98.25	$ 50.14	$ 58.96		$ 61.95									$ 114.89	$ 178.04		$ 154.27		$ 153.78	$ 132.01							$ 70.76	$ 107.99		$ 82.30							$ 136.33	$ 195.48		$ 156.50							$ 99.68	$ 153.46		$ 112.44

[1] Values are for both the Managing Owner and Limited Owners.

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Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Frontier Funds [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	$ (1,068,744)	$ (10,280,638)
Change in:
Net change in open trade equity/(deficit), at fair value	(534,165)	763,917
Net unrealized (gain)/loss on swap contracts	349,463	(1,532,308)
Net unrealized (gain)/loss on U.S. Treasury securities	85,272	13,612
Net realized (gain)/loss on U.S. Treasury securities	(103,338)	288,824
Net unrealized (gain)/loss on private investment companies	(2,834,733)	9,139,562
Net realized (gain)/loss on private investment companies	1,920,406	(844,793)
(Purchases) sales of:
Sales of U.S. Treasury securities	8,139,078	9,749,302
Purchase of U.S. Treasury securities	(5,275,023)	(6,197,080)
U.S. Treasury interest and premium paid/amortized	31,024	70,476
Purchase of Private Investment Companies	(18,881,035)	(13,480,163)
Reduction of collateral in Swap contracts		3,100,000
Sale of Private Investment Companies	14,680,430	14,510,340
Increase and/or decrease in:
Interest receivable	98,264	168,264
Receivable from related parties		(11,636)
Other assets	(381,566)	(18,183)
Incentive fees payable to Managing Owner	(10,897)	95,373
Management fees payable to Managing Owner	(69,079)	85,339
Interest payable to Managing Owner	(3,455)	(8,604)
Trading fees payable to Managing Owner	(26,079)	(206,297)
Service fees payable to Managing Owner	(17,362)	127,561
Subscriptions in advance for service fee rebates	51,370
Other liabilities	132,043	(278,983)
Receivable from futures commission merchants	8,387,671	9,948,318
Due from Managing Owner	(3,727)	475
Risk analysis fees payable	(12,295)	4,779
Net cash provided by (used in) operating activities	4,653,523	15,207,457
Cash Flows from Financing Activities:
Payment for redemption of capital	(6,030,355)	(6,502,692)
Redemptions payable	65,936	(23,603)
Net cash provided by (used in) financing activities	(5,964,419)	(6,526,295)
Net increase (decrease) in cash and cash equivalents	(1,310,896)	8,681,162
Cash and cash equivalents, beginning of period	1,729,879	2,695,377
Cash and cash equivalents, end of period	418,983	11,376,539
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	240,639	(1,334,048)
Change in:
Net change in open trade equity/(deficit), at fair value
Net realized gain/(loss) on futures, forwards and options
Net change in ownership allocation of U.S. Treasury securities	(2,868,141)	(664,565)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	72,893	(27,490)
Net realized (gain)/loss on U.S. Treasury securities	(77,673)	155,025
Net unrealized (gain)/loss on private investment companies	(688,108)
Net realized (gain)/loss on private investment companies
(Purchases) sales of:
Sales of U.S. Treasury securities	6,105,545	5,234,675
Purchase of U.S. Treasury securities	(2,132,656)	(2,418,631)
U.S. Treasury interest and premium paid/amortized		28,974
Purchase of Private Investment Companies	(4,423,706)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	3,973,037	3,502,685
Interest receivable	50,798	89,359
Receivable from related parties		(11,319)
Other assets		(74,529)
Incentive fees payable to Managing Owner		34,469
Management fees payable to Managing Owner	(42,705)	34,469
Interest payable to Managing Owner	(2,620)	(11,077)
Trading fees payable to Managing Owner	(5,212)	(17,037)
Service fees payable to Managing Owner	(3,915)	(1,445)
Due to Managing Owner
Subscriptions in advance for service fee rebates	9,187
Other liabilities	129,745	(82,265)
Receivable from futures commission merchants
Due from Managing Owner
Risk analysis fees payable
Net cash provided by (used in) operating activities	337,108	4,402,781
Cash Flows from Financing Activities:
Payment for redemption of units	(986,101)	(316,142)
Change in owner redemptions payable
Net cash provided by (used in) financing activities	(986,101)	(316,142)
Net increase (decrease) in cash and cash equivalents	(648,993)	4,086,639
Cash and cash equivalents, beginning of period	951,485	1,403,125
Cash and cash equivalents, end of period	302,492	5,489,764
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(28,392)	(809,097)
Change in:
Net change in open trade equity/(deficit), at fair value
Net realized gain/(loss) on futures, forwards and options
Net change in ownership allocation of U.S. Treasury securities	(100,254)	246,124
Net unrealized (gain)/loss on swap contracts	50,194	4,796
Net unrealized (gain)/loss on U.S. Treasury securities	7,239	(945)
Net realized (gain)/loss on U.S. Treasury securities	(8,382)	24,499
Net unrealized (gain)/loss on private investment companies	(140,824)	542,177
Net realized (gain)/loss on private investment companies	6,746	(1,707)
(Purchases) sales of:
Sales of U.S. Treasury securities	645,710	827,151
Purchase of U.S. Treasury securities	(278,310)	(453,470)
U.S. Treasury interest and premium paid/amortized		4,655
Purchase of Private Investment Companies	(1,083,866)	(477,416)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	192,052	22,971
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	695,297
Interest receivable	7,952	740,272
Receivable from related parties		17,984
Other assets		(1)
Incentive fees payable to Managing Owner		1,394
Management fees payable to Managing Owner	(9,201)	11,721
Interest payable to Managing Owner	(619)	(1,459)
Trading fees payable to Managing Owner	1,068	(1,708)
Service fees payable to Managing Owner	(626)	(1,910)
Due to Managing Owner
Subscriptions in advance for service fee rebates	4,880
Other liabilities	2,103	(7,542)
Receivable from futures commission merchants
Due from Managing Owner
Risk analysis fees payable
Net cash provided by (used in) operating activities	(37,233)	688,489
Cash Flows from Financing Activities:
Payment for redemption of units	(85,652)	(295,955)
Change in owner redemptions payable	14,345	(3)
Net cash provided by (used in) financing activities	(71,307)	(295,958)
Net increase (decrease) in cash and cash equivalents	(108,540)	392,531
Cash and cash equivalents, beginning of period	135,096	259,161
Cash and cash equivalents, end of period	26,556	651,692
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(719,138)	(3,705,205)
Change in:
Net change in open trade equity/(deficit), at fair value	76,833	(110,265)
Net change in ownership allocation of U.S. Treasury securities	1,528,663	(680,881)
Net unrealized (gain)/loss on swap contracts	195,186	(999,842)
Net unrealized (gain)/loss on U.S. Treasury securities	(14,684)	9,963
Net realized (gain)/loss on U.S. Treasury securities	3,429	23,857
Net unrealized (gain)/loss on private investment companies	(903,551)	4,007,917
Net realized (gain)/loss on private investment companies	747,334	(297,238)
(Purchases) sales of:
Sales of U.S. Treasury securities		804,315
Purchase of U.S. Treasury securities	(1,693,363)	(951,075)
U.S. Treasury interest and premium paid/amortized	11,360	13,548
Purchase of Private Investment Companies	(7,114,581)	(4,583,751)
Reduction of collateral in Swap contracts		2,000,000
Sale of Private Investment Companies	9,087,067	4,072,643
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,671,454	1,059,099
Interest receivable	604	3,454
Receivable from related parties	(292,131)
Other assets
Incentive fees payable to Managing Owner		104,945
Management fees payable to Managing Owner	(4,951)	6,614
Interest payable to Managing Owner	(253)	3,432
Trading fees payable to Managing Owner	(13,183)	(18,201)
Service fees payable to Managing Owner	(9,638)	(12,608)
Subscriptions in advance for service fee rebates	25,560
Other liabilities		(49,891)
Receivable from futures commission merchants	(26,764)	4,561,645
Due from Managing Owner		159
Risk analysis fees payable	(50)	508
Net cash provided by (used in) operating activities	2,555,203	5,263,142
Cash Flows from Financing Activities:
Payment for redemption of units	(2,557,903)	(3,000,861)
Change in owner redemptions payable	8,132	(67,074)
Net cash provided by (used in) financing activities	(2,549,771)	(3,067,935)
Net increase (decrease) in cash and cash equivalents	5,432	2,195,207
Cash and cash equivalents, beginning of period	37,556	164,332
Cash and cash equivalents, end of period	42,988	2,359,539
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(41,066)	(972,128)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	(270,667)	378,992
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	2,737	12,143
Net realized (gain)/loss on U.S. Treasury securities	(3,463)	7,665
Net unrealized (gain)/loss on private investment companies	(82,768)	1,018,761
Net realized (gain)/loss on private investment companies	50,950	(138,136)
(Purchases) sales of:
Sales of U.S. Treasury securities	299,322	258,615
Purchase of U.S. Treasury securities	(44,178)	(409,224)
U.S. Treasury interest and premium paid/amortized		2,829
Purchase of Private Investment Companies	(212,825)	(1,982,381)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	374,648	2,367,765
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	23,031	53,452
Interest receivable	1,034	7,735
Receivable from related parties
Other assets		(3,472)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Interest payable to Managing Owner	37	(1,115)
Trading fees payable to Managing Owner	(329)	(3,419)
Service fees payable to Managing Owner	(668)	(2,961)
Subscriptions in advance for service fee rebates	1,712
Other liabilities	1,167	(57,285)
Receivable from futures commission merchants
Due from Managing Owner
Risk analysis fees payable
Net cash provided by (used in) operating activities	98,674	589,386
Cash Flows from Financing Activities:
Payment for redemption of units	(144,628)	(355,648)
Change in owner redemptions payable	35,604
Net cash provided by (used in) financing activities	(109,024)	(355,648)
Net increase (decrease) in cash and cash equivalents	(10,350)	233,738
Cash and cash equivalents, beginning of period	25,072	114,973
Cash and cash equivalents, end of period	14,722	348,711
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(203,945)	(1,701,986)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	1,620,832	54,273
Net unrealized (gain)/loss on swap contracts	86,648	(451,993)
Net unrealized (gain)/loss on U.S. Treasury securities	18,038	5,937
Net realized (gain)/loss on U.S. Treasury securities	(15,071)	23,575
Net unrealized (gain)/loss on private investment companies	(442,738)	1,946,997
Net realized (gain)/loss on private investment companies	332,437	(159,265)
(Purchases) sales of:
Sales of U.S. Treasury securities	973,376	794,756
Purchase of U.S. Treasury securities	(1,043,914)	(617,497)
U.S. Treasury interest and premium paid/amortized		7,674
Purchase of Private Investment Companies	(3,997,991)	(2,267,929)
Reduction of collateral in Swap contracts		1,100,000
Sale of Private Investment Companies	2,847,023	2,229,143
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,141,174	723,891
Interest receivable	32,017	11,801
Receivable from related parties	(3,199)
Other assets	(31,288)
Incentive fees payable to Managing Owner	(10,897)	(10,966)
Management fees payable to Managing Owner	(3,875)	4,007
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(2,559)	(8,381)
Service fees payable to Managing Owner	(2,008)	(641)
Subscriptions in advance for service fee rebates	5,989
Other liabilities	2,665	(26,489)
Net cash provided by (used in) operating activities	1,302,714	1,656,907
Cash Flows from Financing Activities:
Payment for redemption of units	(1,775,410)	(1,046,000)
Change in owner redemptions payable		13,445
Net cash provided by (used in) financing activities	(1,775,410)	(1,032,555)
Net increase (decrease) in cash and cash equivalents	(472,696)	624,352
Cash and cash equivalents, beginning of period	472,695	189,890
Cash and cash equivalents, end of period		814,242
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(178,571)	(1,635,794)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	446,301	834,551
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	(3,930)	16,571
Net realized (gain)/loss on U.S. Treasury securities	1,931	29,226
Net unrealized (gain)/loss on private investment companies	(64,219)	1,342,127
Net realized (gain)/loss on private investment companies	103,856	(158,432)
(Purchases) sales of:
Sales of U.S. Treasury securities		985,558
Purchase of U.S. Treasury securities	(323,654)	(930,341)
U.S. Treasury interest and premium paid/amortized	690	8,378
Purchase of Private Investment Companies	(1,803,933)	(2,355,780)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	1,428,047	2,821,988
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	759,982	971,628
Interest receivable	2,932	28,000
Receivable from related parties
Other assets	(56,644)	(29,580)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner	(8,347)	11,892
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(4,661)	(8,918)
Service fees payable to Managing Owner	(463)	(616)
Subscriptions in advance for service fee rebates	3,899
Other liabilities	367
Net cash provided by (used in) operating activities	303,583	1,930,458
Cash Flows from Financing Activities:
Payment for redemption of units	(345,323)	(1,195,341)
Change in owner redemptions payable		28,105
Net cash provided by (used in) financing activities	(345,323)	(1,167,236)
Net increase (decrease) in cash and cash equivalents	(41,740)	763,222
Cash and cash equivalents, beginning of period	46,374	411,695
Cash and cash equivalents, end of period	4,634	1,174,917
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(165,401)	(124,708)
Change in:
Net change in open trade equity/(deficit), at fair value
Net change in ownership allocation of U.S. Treasury securities	(338,182)	(168,492)
Net unrealized (gain)/loss on swap contracts	17,437	(85,270)
Net unrealized (gain)/loss on U.S. Treasury securities	2,979	(2,568)
Net realized (gain)/loss on U.S. Treasury securities	(4,109)	24,986
Net unrealized (gain)/loss on private investment companies	(410,350)	84,865
Net realized (gain)/loss on private investment companies	545,569	81,438
(Purchases) sales of:
Sales of U.S. Treasury securities	390,642	844,232
Purchase of U.S. Treasury securities	(34,463)	(416,842)
U.S. Treasury interest and premium paid/amortized	698	4,420
Purchase of Private Investment Companies	(232,986)	(612,567)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	326,194	995,830
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	4,235	58,812
Interest receivable	2,927	9,929
Receivable from related parties
Other assets	(1,503)	(16,909)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Interest payable to Managing Owner		32
Trading fees payable to Managing Owner	(1,203)	(816)
Service fees payable to Managing Owner	(44)	(76)
Subscriptions in advance for service fee rebates
Other liabilities	143
Net cash provided by (used in) operating activities	102,583	676,296
Cash Flows from Financing Activities:
Payment for redemption of units	(144,447)	(292,743)
Change in owner redemptions payable	7,855	1,922
Net cash provided by (used in) financing activities	(136,592)	(290,821)
Net increase (decrease) in cash and cash equivalents	(34,009)	385,475
Cash and cash equivalents, beginning of period	61,600	152,200
Cash and cash equivalents, end of period	$ 27,591	$ 537,675

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Organization and Purpose

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Organization and Purpose

1. Organization and Purpose

Frontier Funds, which is referred to in this report as the "Trust", was formed on August 8, 2003, as a Delaware statutory trust and is set to expire on December 31, 2053. The Trust is a multi-advisor commodity pool, as described in CFTC Regulation § 4.10(d)(2). The Trust has authority to issue separate Series of Units pursuant to the requirements of the Trust Act. The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act. It is managed by the Managing Owner.

Purchasers of Units are Limited Owners of the Trust with respect to beneficial interests of the Series' Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, as amended from time to time (the "Trust Agreement"), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series' assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of all Series.

The Trust has been organized to pool investor funds for the purpose of trading in the U.S. and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts.

The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund (Formerly Frontier Winton Fund), and Frontier Heritage Fund. The Trust financial statements are comprised of unitized Series which are consolidated into the Trust financial statements. However, the consolidated Trust does not issue units.

The Trust, with respect to each Series:

● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions;

● allocates funds to a limited liability trading company or companies ("Trading Company" or "Trading Companies") and Galaxy Plus entities ("Galaxy Plus"). Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor(s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company's and Galaxy Plus entity's assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity;

● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series;

● calculates the Net Asset Value ("NAV") of its Units for each Series separately from the other Series;

● has an investment objective of increasing the value of each Series' Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments;

● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and

● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. ("FINRA") and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA ("Rule 2310"). An investor's Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York.

The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust on account of and for the benefit of that Series. Under the "Inter-Series Limitation on Liability" expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series.

As of March 31, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into three separate Classes—Class 1, Class 2, and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes – Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes— Class 1, Class 1AP, Class 2, Class 2A and Class 3A. The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes— Class 1A, Class 2A, Class 2, Class 3A and Class 3. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform ("Galaxy Plus") which is an unaffiliated, third-party managed account platform. The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP's Multi-Strategy Program, Quantitative Investment Management, LLC's Quantitative Global Program, Quest Partners LLC's Quest Tracker Index Program, Chesapeake Capital Management, LLC's Diversified Program, and Doherty Advisors LLC's Relative Value Moderate Program, the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC's Multi-Strategy Program, Red Oak Commodity Advisors, Inc.'s Fundamental Diversified Program, Rosetta Capital Management, LLC's Rosetta Trading Program, and Landmark Trading Company's Landmark Program, the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.'s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.'s Global Contrarian Program have been transferred to individual Delaware limited liability companies ("Master Funds") in Galaxy Plus. Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC ("Sponsor"). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors' respective program. For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds. The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities. For those Series that do not invest in Galaxy Plus, their assets are split between investments in Trading Companies and investments in the pooled cash management account.

Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities.

The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence or willful misconduct.

The Series of the Frontier Funds [Member]

Organization and Purpose

1. Organization and Purpose

Frontier Funds, which is referred to in this report as the "Trust", was formed on August 8, 2003, as a Delaware statutory trust. Please refer to the consolidated financial statements of the Trust included within this periodic report. The Trust is a multi-advisor commodity pool, as described in Commodity Futures Trading Commission (the "CFTC") Regulation § 4.10(d)(2). The Trust has authority to issue separate series, or each, a Series, of units of beneficial interest (the "Units") pursuant to the requirements of the Delaware Statutory Trust Act, as amended (the "Trust Act"). The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act of 1940, as amended (the "Investment Company Act"). It is managed by Frontier Fund Management LLC (the "Managing Owner").

Purchasers of Units are limited owners of the Trust ("Limited Owners") with respect to beneficial interests of the Series' Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, and may be amended from time to time ("Trust Agreement"), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series' assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust.

The Trust has been organized to pool investor funds for the purpose of trading in the United States ("U.S.") and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts.

The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund (formerly Frontier Winton Fund), and Frontier Heritage Fund (each a "Series" and collectively, the "Series"). The Trust, with respect to the Series, may issue additional Series of Units.

The Trust, with respect to each Series:

● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions;

● allocates funds to a limited liability trading company or companies ("Trading Company" or "Trading Companies") and Galaxy Plus entities ("Galaxy Plus"). Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor (s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company's and Galaxy Plus entity's assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity;

● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series;

● calculates the Net Asset Value ("NAV") of its Units for each Series separately from the other Series;

● has an investment objective of increasing the value of each Series' Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments;

● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and

● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. ("FINRA") and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA ("Rule 2310"). An investor's Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York.

The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust, with respect to the Series, on account of and for the benefit of that Series. Under the "Inter-Series Limitation on Liability" expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series.

As of March 31, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund separates Units into three separate Classes—Class 1, Class 2, and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes – Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes— Class 1, Class 1AP, Class 2, Class 2A and Class 3A.   The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes—Class 1A, Class 2A, Class 2, Class 3A and Class 3. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform ("Galaxy Plus") which is an unaffiliated, third-party managed account platform.  The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP's Multi-Strategy Program, Quantitative Investment Management, LLC's Quantitative Global Program, Quest Partners LLC's Quest Tracker Index Program, Chesapeake Capital Management, LLC's Diversified Program, and Doherty Advisors LLC's Relative Value Moderate Program,  the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC's Multi-Strategy Program, Red Oak Commodity Advisors, Inc.'s Fundamental Diversified Program, Rosetta Capital Management, LLC's Rosetta Trading Program, and Landmark Trading Company's Landmark Program,  the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.'s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.'s Global Contrarian Program have been transferred to individual Delaware limited liability companies ("Master Funds") in Galaxy Plus.   Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC ("Sponsor"). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors' respective program.  For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds.  The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities.  For those Series that do not invest in Galaxy Plus, their assets are split between investments in Trading Companies and investments in the pooled cash management account.

Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities.

The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct.

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Significant Accounting Policies

2. Significant Accounting Policies

The following are the significant accounting policies of the Trust.

Basis of Presentation—The Trust follows GAAP, as established by the Financial Accounting Standards Board (the "FASB"), to ensure consistent reporting of financial condition, condensed schedules of investments, results of operations, changes in capital and cash flows. The Trust is an investment company following accounting and reporting guidance in Accounting Standards Codification ("ASC") 946.

Consolidation—The Series, through investing in the Trading Companies and Galaxy Plus, authorize certain Trading Advisors to place trades and manage assets at pre-determined investment levels. The Trading Companies were organized by the Managing Owner for the purpose of investing in commodities interests and derivative instruments, and have no operating income or expenses, except for trading income and expenses and a risk analysis fee (for closed Series only), all of which is allocated to the Series, if consolidated by a Series. Galaxy Plus is a series of Delaware limited liability companies, sponsored by Gemini Alternative Funds, LLC, that create exposure to a variety of third party professional managed futures and foreign exchange advisors. Galaxy Plus is available to qualified high-net-worth individuals and institutional investors. Investment interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Trust's interest in the NAV in the Galaxy Plus entities. The equity interest held by Trust is shown as investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion to of the investment level of the private investment companies is shown in the statements of operations as net unrealized gain/(loss) on private investment companies. The Trading Companies and Series of the Trust are consolidated by the Trust. All intercompany transactions have been eliminated in consolidation.

Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a "fund of funds" approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.

Use of Estimates—The preparation of consolidated financial statements in conformity with GAAP may require the Managing Owner to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The valuation of swap contracts requires significant estimates as well as the valuation of certain other investments. Please refer to Note 3 for discussion of valuation methodology. Actual results could differ from these estimates and such differences could be material.

Cash and Cash Equivalents—Cash and cash equivalents include cash and overnight investments in interest-bearing demand deposits held at banks with original maturities of three months or less. This cash is not restricted.

Interest Income—U.S. Treasury Securities are pooled for purposes of maximizing returns on these assets to investors of all Series. Interest income from pooled cash management assets is recognized on the accrual basis and allocated daily to each Series based upon its daily proportion of ownership of the pool. Aggregate interest income from all sources, including U.S. Treasuries and assets held at a futures commission merchant ("FCM"), of up to two percentage points of the aggregate percentage yield (annualized) of net asset value less any fair market value related to swaps, is paid to the Managing Owner by the Frontier Balanced Fund (Class 1, and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. All interest not paid to the Managing Owner is interest income to the Series, and shown net on the statement of operations.

U.S. Treasury Securities—U.S. Treasury Securities are reported at fair value as Level 1 inputs under ASC 820, Fair Value Measurements and Disclosures ("ASC 820"). The Trust values U.S. Treasury Securities at fair value and records the daily change in value in the consolidated statements of operations as net unrealized gain/(loss) on U.S. Treasury securities. Accrued interest is reported on the consolidated statements of financial condition as interest receivable.

Receivable from Futures Commission Merchants—The Trust deposits assets with a FCM subject to CFTC regulations and various exchange and broker requirements. Margin requirements are satisfied by the deposit of cash with such FCM. The Trust earns interest income on its assets deposited with the FCM. A portion of the receivable is restricted cash required to meet maintenance margin requirements. Cash with the clearing broker as of December 31, 2018 and March 31, 2019 included restricted cash for margin requirements of $1,717,065 and $1,236,259 for the Frontier Trading Company I LLC, and $4,621,100 and $7,839 for Frontier Trading Company II LLC, respectively.

Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the consolidated statements of financial condition as a net unrealized gain or loss, as there exists a right of offset of unrealized gains or losses in accordance with FASB ASC 210, Balance Sheet ("ASC 210") and Accounting Standards Update (ASU) 2013-01, Balance Sheet (Topic 210).

Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations.

Purchase and Sales of Private Investment Companies—The Trust is able to subscribe into and redeem from the Galaxy Plus entities on a weekly basis. The value of the private investment companies is determined by the Sponsor and reported on a daily basis. The change in value is calculated as the difference between the total purchase proceeds and the fair value calculated by the Sponsor and is recorded as net unrealized gain/(loss) on private investment companies on the statements of operations.

Foreign Currency Transactions—The Series of the Trust's functional currency is the U.S. dollar; however, they transact business in currencies other than the U.S. dollar. The Series of the Trust do not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from fluctuations arising from changes in market prices of securities held. Such fluctuations are included with the net realized or unrealized gain or loss from investments.

Allocation of Earnings—Each Series of the Trust may maintain three to seven classes of Units—Class 1, Class 2, Class 3, Class 1a, Class 2a Class 3a and Class 1AP. All classes have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that fees charged to a Class or Series differ as described below. Revenues, expenses (other than expenses attributable to a specific class), and realized and unrealized trading gains and losses of each Series are allocated daily to Class 1, Class 1a, Class 2, Class 2a, Class 3, Class 3a and Class 1AP Units based on each Class' respective owners' capital balances as applicable to the classes maintained by the Series.

Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series' ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series' funds allocated to the Trading Companies or Galaxy Plus entities.

Investments and Swaps—The Trust records investment transactions on a trade date basis and all investments are recorded at fair value, with changes in fair value reported as a component of realized and unrealized gains/(losses) on investments in the statements of operations. Investments in private investment companies are valued utilizing the net asset values as a practical expedient. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the discretion of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more underlying investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or "swapped" between the parties are calculated with respect to a "notional amount" (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a "basket" of securities. The valuation of swap contracts requires significant estimates. Swap contracts are reported at fair value based upon daily reports from the counterparty. The Managing Owner reviews and approves current day pricing of the CTA positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, that is used to determine a daily fair value NAV for the swap contracts.

Income Taxes—The Trust applies the provisions of ASC 740 Income Taxes ("ASC 740"), which provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements. This interpretation also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods and disclosure. ASC 740 requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Trust's financial statements to determine whether the tax positions are "more-likely-than-not" of being sustained by the applicable tax authority. Tax positions with respect to tax at the Trust's level not deemed to meet the "more-likely-than-not" threshold would be recorded as a tax benefit or expense in the current year. The Managing Owner has concluded there is no tax expense, interest or penalties to be recorded by the Trust for the quarter ended March 31, 2019. The 2015 through 2018 tax years generally remain subject to examination by U.S. federal and most state tax authorities.

In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes "qualifying income" within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading "U.S. Federal Income Tax Consequences" correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust.

Fees and Expenses—All management fees, incentive fees, service fees, risk analysis fees (for closed Series only) and trading fees of the Trust are paid to the Managing Owner. It is the responsibility of the Managing Owner to pay all Trading Advisor management and incentive fees, selling agent service fees and all other operating expenses and continuing offering costs of the Trust. Only management fees and incentive fees related to assets allocated through Trading Companies are included in expense on the Consolidated Statement of Operations. The Series are all charged management and incentive fees on the asset allocated through the Galaxy Plus entities. Those fees are included in unrealized gain/(loss) on private investment companies on the Consolidated Statements of Operations. The Series are also charged management and incentive fees on assets allocated to swaps. Such fees are embedded in the fair value of the swap and are included in net unrealized gain (loss) on swap contracts on the Consolidated Statements of Operations.

Incentive Fee (rebate)—The Managing Owner is allowed to share in the incentive fees earned by the Commodity Trading Advisors up to 10% of New Net Profits (as defined in the prospectus). If the Managing Owner's share of the incentive fee exceeds 10% of new net profits during the period, then the Managing Owner is obligated to return any amount in excess. The returned amounts are recorded as Incentive Fee (Rebate) on the Consolidated Statements of Operations.

Service Fees—The Trust may maintain each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such Selling agents.

Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $497,326 and $548,696 as of December 31, 2018 and March 31, 2019, respectively.

These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.

Pending Owner Additions—Funds received for new subscriptions and for additions to existing owner interests are recorded as capital additions at the NAV per unit of the second business day following receipt.

Owner redemptions payable—Funds payable for existing owner redemption requests are recorded as capital subtractions at the NAV per unit on the second business day following receipt or request.

Recently Issued Accounting Pronouncements—In August 2018, FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement ("ASU 2018-13"). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies that are required to include fair value measurement disclosures. In general, the amendments in ASU 2018-13 are effective for all entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. An entity is permitted to early adopt the removed or modified disclosures upon the issuance of ASU 2018-13 and may delay adoption of the additional disclosures, which are required for public companies only, until their effective date. Management is currently evaluating the impacts ASU 2018-13 will have on the consolidated financial statements. Refer to Note 11.

Subsequent Events—The Trust follows the provisions of ASC 855, Subsequent Events, which establishes general standards of accounting for and disclosure of events that occur after the balance sheet date and up through the date the financial statements are issued. Refer to Note 11.

The Series of the Frontier Funds [Member]

Significant Accounting Policies

2. Significant Accounting Policies

The following are the significant accounting policies of the Series of the Trust.

Basis of Presentation—The Series of the Trust follow U.S. Generally Accepted Accounting Principles (“GAAP”), as established by the Financial Accounting Standards Board (the “FASB”), to ensure consistent reporting of financial condition, condensed schedules of investments, results of operations, changes in capital and cash flows. The Trust is an investment company following accounting and reporting guidance in Accounting Standards Codification (“ASC”) 946.

Consolidation— The Series, through investing in the Trading Companies and Galaxy Plus entities, authorize certain Trading Advisors to place trades and manage assets at pre-determined investment levels. The Trading Companies were organized by the Managing Owner for the purpose of investing in commodities interests and derivative instruments, and have no operating income or expenses, except for trading income and expenses and a risk analysis fee (for closed Series only), all of which is allocated to the Series if consolidated by a Series. Galaxy Plus is a series of Delaware limited liability companies, sponsored by Gemini Alternative Funds, LLC, that create exposure to a variety of third party professional managed futures and foreign exchange advisors. Galaxy Plus is available to qualified high-net-worth individuals and institutional investors. Trading Companies in which a Series has a controlling and majority interest as calculated on that Series’ pro-rata net asset value in the Trading Company are consolidated by such Series.

Investments in Trading Companies in which a Series does not have a controlling and majority interest and all interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Series’ interest in the NAV in a Trading Company or Galaxy Plus entity. The equity interest held by Series of the Trust is shown as investments in unconsolidated Trading Companies or investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies.

Galaxy Plus entities are co-mingled investment vehicles.  In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers.  As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.

Use of Estimates—The preparation of financial statements in conformity with GAAP may require the Managing Owner to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The valuation of swap contracts requires significant estimates as well as the valuation of certain other investments. Please refer to Note 3 for discussion of valuation methodology. Actual results could differ from these estimates, and such differences could be material.

Cash and Cash Equivalents—Cash and cash equivalents include cash and overnight investments in interest-bearing demand deposits held at banks with original maturities of three months or less. This cash is not restricted.

Interest Income— U.S. Treasury Securities are pooled for purposes of maximizing returns on these assets to investors of all Series. Interest income from pooled cash management assets is recognized on the accrual basis and allocated daily to each Series based upon its daily proportion of ownership of the pool. Aggregate interest income from all sources, including U.S. Treasuries and assets held at a futures commission merchant (“FCM”), of up to two percentage points of the aggregate percentage yield (annualized) of net asset value less any fair market value related to swaps, is paid to the Managing Owner by the Frontier Balanced Fund (Class 1, and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. All interest not paid to the Managing Owner is interest income to the Series and shown net on the statement of operations. The amount reflected in the financial statements of the Series are disclosed on a net basis. Due to some classes not exceeding the 2% paid to the Managing Owner, amounts earned by those Series may be zero.

U.S. Treasury Securities—U.S. Treasury Securities are allocated to all Series of the Trust based on each Series’ percentage ownership in the pooled cash management assets as of the reporting date. They are reported at fair value as Level 1 inputs under ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). The Series of the Trust valued U.S. Treasury Securities at fair value and recorded the daily change in value in the statements of operations as net unrealized gain/(loss) on U.S. Treasury securities. Accrued interest is reported on the statements of financial condition as interest receivable.

Receivable From Futures Commission Merchants—The Series of the Trust deposit assets with a FCM subject to CFTC regulations and various exchange and broker requirements. Margin requirements are satisfied by the deposit of cash with such FCM. The Trust, with respect to the Series, earns interest income on its assets deposited with the FCM. A portion of the receivable is restricted cash required to meet maintenance margin requirements. Cash with the clearing broker as of March 31, 2019 and December 31, 2018 included restricted cash for margin requirements of $1,236,259 and $1,717,065, respectively, for the Frontier Balanced Fund.

Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the statements of financial condition as open trade equity (deficit) for futures and forwards as there exists a right of offset of unrealized gains or losses in accordance with ASC 210, Balance Sheet (“ASC 210”) and Accounting Standards Update (ASU) 2013-01, Balance Sheet (Topic 210).

Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations.

Purchase and Sales of Private Investment Companies – The Series are able to subscribe into and redeem from the Galaxy Plus entities on a weekly basis. The value of the private investment companies is determined by the Sponsor and reported on a daily basis. The change in value is calculated as the difference between the total purchase proceeds and the fair value calculated by the Sponsor and is recorded as net unrealized gain/(loss) on private investment companies on the statements of operations.

Foreign Currency Transactions—The Series’ functional currency is the U.S. dollar; however, they transact business in currencies other than the U.S. dollar. The Series do not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from fluctuations arising from changes in market prices of securities held. Such fluctuations are included with the net realized or unrealized gain or loss from investments.

Allocation of Earnings—Each Series of the Trust may maintain three to seven subclasses of Units—Class 1, Class 2, Class 3, Class 1a, Class 2a, Class 3a, and Class 1AP. All classes have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that fees charged to a Class or Series differ as described below. Revenues, expenses (other than expenses attributable to a specific class), and realized and unrealized trading gains and losses of each Series are allocated daily to Class 1, Class 2, Class 3, Class 1a, Class 2a, Class 3a, and Class 1AP Units based on each Class’ respective owners’ capital balances as applicable to the classes maintained by the Series.

Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.

Investments and Swaps—The Trust, with respect to the Series, records investment transactions on a trade date basis and at fair value, with changes in fair value reported as a component of realized and unrealized gains/(losses) on investments in the statements of operations. Investments in private investment companies are valued utilizing the net asset values as a practical expedient. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the discretion of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more underlying investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. The valuation of swap contracts requires significant estimates. Swap contracts are reported at fair value based upon daily reports from the counterparty. The Managing Owner reviews and approves current day pricing of the commodity trading advisor (“CTA”) positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, that is used to determine a daily fair value NAV for the swap contracts. 

Income Taxes—The Trust, with respect to the Series, applies the provisions of ASC 740 Income Taxes (“ASC 740”), which provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements. This interpretation also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods and disclosure. ASC 740 requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Trust, with respect to the Series’, financial statements to determine whether the tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax positions with respect to tax at the Trust’s level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The Managing Owner has concluded there is no tax expense, interest or penalties to be recorded by the Trust, with respect to the Series. The 2015 through 2018 tax years generally remain subject to examination by U.S. federal and most state tax authorities.

In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust.

Fees and Expenses—All management fees, incentive fees, service fees, risk analysis fees (for closed Series only) and trading fees of the Trust, with respect to the Series, are paid to the Managing Owner. It is the responsibility of the Managing Owner to pay all Trading Advisor management and incentive fees, selling agent service fees and all other operating expenses and continuing offering costs of the Trust, with respect to the Series. Only management fees and incentive fees related to assets allocated through Trading Companies are included in expense on the Statement of Operations. The Series are all charged management and incentive fees on the asset allocated through the Galaxy Plus entities. Those fees are included in unrealized gain/(loss) on private investment companies on the Statements of Operations. The Series are also charged management and incentive fees on assets allocated to swaps.  Such fees are embedded in the fair value of the swap and are included in net unrealized gain (loss) on swap contracts on the Statements of Operations.

Incentive Fee (rebate)—The Managing Owner is allowed to share in the incentive fees earned by the CTAs up to 10% of New Net Profits (as defined in the prospectus). If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period for a particular series, then the Managing Owner is obligated to return any amount in excess to the Series. The returned amounts are recorded as Incentive Fee (Rebate) on the Statements of Operations.

Service Fees—The Trust may maintain each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.

Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $26,419, $31,999, $143, $283,754, $12,874, $142,468 and $51,039 for the Frontier Diversified, Masters,  Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of March 31, 2019 and $20,430, $28,100, none, $258,194, $11,162, $133,281 and $46,159 respectively, as of December 31, 2018.

These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.

Pending Owner Additions—Funds received for new subscriptions and for additions to existing owner interests are recorded as capital additions at the NAV per unit of the second business day following receipt.

Owner redemptions payable—Funds payable for existing owner redemption requests are recorded as capital subtractions at the NAV per unit on the second business day following receipt or request.

Recently Issued Accounting Pronouncements— In August 2018, FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies that are required to include fair value measurement disclosures. In general, the amendments in ASU 2018-13 are effective for all entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. An entity is permitted to early adopt the removed or modified disclosures upon the issuance of ASU 2018-13 and may delay adoption of the additional disclosures, which are required for public companies only, until their effective date. Management is currently evaluating the impacts ASU 2018-13 will have on the financial statements.

Subsequent Events—The Series follow the provisions of ASC 855, Subsequent Events, which establishes general standards of accounting for and disclosure of events that occur after the balance sheet date and up through the date the financial statements are issued. Refer to Note 11.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Fair Value Measurements

3. Fair Value Measurements

In connection with the valuation of investments the Trust applies Fair Value Measurement ("ASC 820"). ASC 820 provides clarification that when a quoted price in an active market for the identical asset or liability is not available, a reporting entity is required to measure fair value using certain techniques. ASC 820 also clarifies that when estimating the fair value of an asset or liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of an asset or liability. ASC 820 also clarifies that both a quoted price in an active market for the identical asset or liability at the measurement date and the quoted price for the identical asset or liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements.

Level 1 Inputs

Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs

Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means.

Level 3 Inputs

Unobservable inputs for determining the fair value of financial assets that reflect an entity's own assumptions about the assumptions that market participants would use in pricing the financial asset.

The Trust, with respect to the Series, uses the following methodologies to value instruments within its financial asset portfolio at fair value:

Trading Securities. These instruments include U.S. Treasury securities and open trade equity positions (futures contracts) that are actively traded on public markets with quoted pricing for corroboration. U.S. Treasury securities and futures contracts are reported at fair value using Level 1 inputs. Trading securities instruments further include open trade equity positions (trading options and currency forwards) that are quoted prices for identical or similar assets that are not traded on active markets. Trading options and currency forwards are reported at fair value using Level 2 inputs.

Swap Contracts. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or "swapped" between parties are calculated with respect to a "notional amount" (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a "basket" of securities. Swap contracts are reported at fair value upon daily reports from the counterparty. In addition, a third party takes the inputs from the counterparty, makes certain adjustments, and runs it through their pricing model to come up with their daily price. The fair value measurements of the swap contracts are valued using unadjusted inputs that were not internally developed.  The Managing Owner reviews and compares approved current day pricing of the CTA positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, in addition to reports from the administrator. Differences in prices exceeding 5% are investigated. Unexplainable differences are escalated to the Managing Owner's Valuation Committee for evaluation and resolution.  The Swap Contracts are reported at fair value using Level 3 inputs.

Investments in Private Investment Companies. Investments in private investment companies are valued utilizing the net asset values provided by the underlying private investment companies as a practical expedient. Each Series applies the practical expedient to its investments in private investment companies on an investment-by-investment basis, and consistently with the Series' entire position in a particular investment, unless it is probable that the Series will sell a portion of an investment at an amount different from the net asset value of the investment.  The private investment companies are excluded from the fair value table below.

The following table summarizes the instruments that comprise the Trust's financial asset portfolio, by Series in aggregate, measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value.

March 31, 2019	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Fair Value
Open Trade Equity (Deficit)	$	206,634	$	(70,658	)	$	-	$	135,976
Swap Contracts		-		-			19,800,401		19,800,401
U.S. Treasury Securities		2,807,036		-			-		2,807,036

December 31, 2018	Level 1 Inputs			Level 2 Inputs		Level 3 Inputs		Fair Value
Open Trade Equity (Deficit)	$	(400,796	)	$	2,607	$	-	$	(398,189	)
Swap Contracts		-			-		20,149,868		20,149,868
U.S. Treasury Securities		5,684,327			-		-		5,684,327

The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in "realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts" on the Consolidated Statement of Operations.

	For the Three Months ended March 31, 2019
Balance of recurring Level 3 assets as of January 1, 2018		20,149,868
Total gains or losses (realized/unrealized):
Included in earnings-realized		-
Included in earnings-unrealized		(349,467	)
Proceeds from collateral reduction		-
Purchase of investments		-
Sale of investments		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of March 31, 2019		19,800,401

	For the Year ended December 31, 2018
Balance of recurring Level 3 assets as of January 1, 2018		21,208,838
Total gains or losses (realized/unrealized):
Included in earnings-realized		-
Included in earnings-unrealized		2,041,028
Proceeds from collateral reduction		(3,099,998	)
Purchase of investments		-
Sale of investments		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of December 31, 2018		20,149,868

The Trust assesses the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Trust's accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the three months ended March 31, 2019, the Trust did not transfer any assets between Levels 1, 2 and 3.

The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at March 31, 2019:

Swaps	$	(349,467	)
The total change in unrealized appreciation (depreciation) included in the consolidated statements of operations attributable to level 3 investments still held at December 31, 2018:
Swaps	$	2,041,028

The Series of the Frontier Funds [Member]

Fair Value Measurements

3. Fair Value Measurements

In connection with the valuation of investments the Series apply ASC 820. ASC 820 provides clarification that when a quoted price in an active market for the identical asset or liability is not available, a reporting entity is required to measure fair value using certain techniques. ASC 820 also clarifies that when estimating the fair value of an asset or liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of an asset or liability. ASC 820 also clarifies that both a quoted price in an active market for the identical asset or liability at the measurement date and the quoted price for the identical asset or liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements.

Level 1 Inputs

Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs

Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means.

Level 3 Inputs

Unobservable inputs for determining the fair value of financial assets that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the financial asset.

The Trust, with respect to the Series, uses the following methodologies to value instruments within its financial asset portfolio at fair value:

Trading Securities. These instruments include U.S. Treasury securities and open trade equity positions (futures contracts) that are actively traded on public markets with quoted pricing for corroboration. U.S. Treasury securities and futures contracts are reported at fair value using Level 1 inputs. Trading securities instruments further include open trade equity positions (trading options and currency forwards) that are quoted prices for identical or similar assets that are not traded on active markets. Trading options and currency forwards are reported at fair value using Level 2 inputs.

Swap Contracts. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between parties are calculated with respect to a “notional amount” (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. Swap contracts are reported at fair value upon daily reports from the counterparty. In addition, a third party takes the inputs from the counterparty, makes certain adjustments, and runs it through their pricing model to come up with their daily price. The fair value measurements of the swap contracts are valued using unadjusted inputs that were not internally developed.  The Managing Owner reviews and compares approved current day pricing of the CTA positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, in addition to reports from the administrator. Differences in prices exceeding 5% are investigated. Unexplainable differences are escalated to the Managing Owner’s Valuation Committee for evaluation and resolution. Swap contracts are reported at fair value using Level 3 inputs. 

Investment in Unconsolidated Trading Companies. This investment represents the fair value of the allocation of cash, futures, forwards, options and swaps to each respective Series relative to its trading allocations from unconsolidated Trading Companies. A Series may redeem its investment in any of the Trading Companies on a daily basis at the Trading Company’s stated net asset value. Each of the Series, all of which are under the same management as the Trading Companies, has access to the underlying positions of the Trading Companies, and as such, the level determination is reflected on that look-through basis. Any redemption of an investment in a Trading Company classified as Level 3 will reflect that classification of the underlying investment owned by the Trading Company. As such, the Series report investments in unconsolidated Trading Companies at fair value using the corresponding inputs of the underlying securities of the Trading Companies which results in the Series reporting the corresponding level determination from the inputs of the Trading Company.

Investments in Private Investment Companies. Investments in private investment companies are valued utilizing the net asset values provided by the underlying private investment companies as a practical expedient. Each Series applies the practical expedient to its investments in private investment companies on an investment-by-investment basis, and consistently with the Series’ entire position in a particular investment, unless it is probable that the Series will sell a portion of an investment at an amount different from the net asset value of the investment. Investments in private investment companies are excluded from the leveling table below. 

The following table summarizes investment in each Series measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value.

	Level 1		Level 2			Level 3		Total
March 31, 2019	Inputs		Inputs			Inputs		Fair Value
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	$	19,736	$	-		$	-	$	19,736
Swap Contracts		-		-			5,833,765		5,833,765
Frontier Masters Fund
Investment in Unconsolidated Trading Companies		15,106		-			-		15,106
U.S. Treasury Securities		31,044		-			-		31,044
Frontier Long/Short Commodity Fund
Investment in Unconsolidated Trading Companies		23,927		-			-		23,927
Swap Contracts		-		-			461,666		461,666
U.S. Treasury Securities		184,850		-			-		184,850
Frontier Balanced Fund
Investment in Unconsolidated Trading Companies		73,545		-			-		73,545
Open Trade Equity (Deficit)		214,486		(70,660	)		-		143,826
Swap Contracts		-		-			10,599,721		10,599,721
U.S. Treasury Securities		288,004		-			-		288,004
Frontier Select Fund
Investment in Unconsolidated Trading Companies		12,767		-			487,382		500,149
U.S. Treasury Securities		98,635		-			-		98,635
Frontier Global Fund
Investment in Unconsolidated Trading Companies		319,038		-			-		319,038
U.S. Treasury Securities		2,026,585		-			-		2,026,585
Frontier Heritage Fund
Investment in Unconsolidated Trading Companies		31,389		-			-		31,389
Swap Contracts		-		-			2,905,249		2,905,249
U.S. Treasury Securities		177,918		-			-		177,918

	Level 1		Level 2			Level 3		Total
December 31, 2018	Inputs		Inputs			Inputs		Fair Value
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	$	1,157,971	$	2,939		$	-	$	1,160,910
Swap Contracts		-		-			5,920,414		5,920,414
U.S. Treasury Securities		1,553,261		-			-		1,553,261
Frontier Masters Fund
Investment in Unconsolidated Trading Companies		772,732		2,356			-		775,088
U.S. Treasury Securities		152,384		-			-		152,384
Frontier Long/Short Commodity Fund
Investment in Unconsolidated Trading Companies		28,163		-			-		28,163
Swap Contracts		-		-			479,102		479,102
U.S. Treasury Securities		202,415		-			-		202,415
Frontier Balanced Fund
Investment in Unconsolidated Trading Companies		1,739,609		5,390			-		1,744,999
Open Trade Equity (Deficit)		242,860		(22,201	)		-		220,659
Swap Contracts		-		-			10,794,908		10,794,908
U.S. Treasury Securities		123,409		-			-		123,409
Frontier Select Fund
Investment in Unconsolidated Trading Companies		11,462		-			511,718		523,180
U.S. Treasury Securities		82,386		-			-		82,386
Frontier Winton Fund
Investment in Unconsolidated Trading Companies		4,280,023		12,052			-		4,292,075
U.S. Treasury Securities		3,126,551		-			-		3,126,551
Frontier Heritage Fund
Investment in Unconsolidated Trading Companies		724,614		2,072			-		726,686
Swap Contracts		-		-			2,955,444		2,955,444
U.S. Treasury Securities		443,921		-			-		443,921

The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the statements of operations. Investment in unconsolidated trading company asset gains and losses (realized/unrealized) included in earnings are classified in “Change in fair value of investments in unconsolidated trading companies.” During the three months ended March 31, 2019, all identified Level 3 assets were components of the Frontier Diversified Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, and Frontier Heritage Fund.

For the Three Months ending March 31, 2019

Swaps

	Frontier Balanced Fund			Frontier Long/Short Commodity Fund
Balance of recurring Level 3 assets as of  January 1, 2019	$	10,794,908		$	479,102
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		(195,187	)		(17,436	)
Proceeds from collateral reduction		-			-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of March 31, 2019	$	10,599,721		$	461,666

	Frontier Diversified Fund			Frontier Heritage Fund
Balance of recurring Level 3 assets as of  January 1, 2019	$	5,920,414		$	2,955,444
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		(86,649	)		(50,194	)
Proceeds from collateral reduction		-			-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of March 31, 2019	$	5,833,765		$	2,905,249

For the Three Months ending March 31, 2019

Investments in Unconsolidated Trading Companies: 

	Frontier Select Fund
Balance of recurring Level 3 assets as of January 1, 2019	$	511,718
Change in fair value of investments in unconsolidated trading companies		(24,336	)
Purchases of investments of unconsolidated trading companies		-
Change in ownership allocation		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of March 31, 2019	$	487,382

For the Year Ended December 31, 2018

Swaps

	Frontier Balanced Fund			Frontier Long/Short Commodity Fund
Balance of recurring Level 3 assets as of January 1, 2018	$	11,340,959		$	397,039
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		1,453,948			82,063
Proceeds from collateral reduction		(1,999,999	)		-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of December 31, 2018	$	10,794,908		$	479,102

	Frontier Diversified Fund			Frontier Heritage Fund
Balance of recurring Level 3 assets as of January 1, 2018	$	6,376,472		$	3,094,367
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		643,941			(138,923	)
Proceeds from collateral reduction		(1,099,999	)		-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of December 31, 2018	$	5,920,414		$	2,955,444

For the Year Ended December 31, 2018

Investments in Unconsolidated Trading Companies:

	Frontier Select Fund
Balance of recurring Level 3 assets as of  January 1, 2018	$	579,073
Change in fair value of investments in unconsolidated
trading companies		(67,355	)
Purchases of investments of unconsolidated		-
trading companies		-
Change in ownership allocation		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of December 31, 2018	$	511,718

The Series of the Trust assess the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Series’ accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the three months ended March 31, 2019, the Trust did not transfer any assets between Levels 1, 2 or 3.

The amounts reflected in the change in ownership allocation result from changes in ownership in the underlying Trading Companies at the Series level, which have resulted in changes in consolidation or de-consolidation by the Series. The ownership in the Trading Companies is accounted for under the equity method, which approximates fair value.

The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at March 31, 2019:

	Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Balanced Fund			Frontier Heritage Fund
Swap Contracts	$	(86,649	)	$	(17,436	)	$	(195,187	)	$	(50,194	)
	Frontier Select Fund
Investments in Unconsolidated Trading Companies	$	(24,336	)

The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018:  

	Frontier Diversified Fund			Frontier Long/Short Commodity Fund		Frontier Balanced Fund		Frontier Heritage Fund
Swap Contracts	$	643,941		$	82,063	$	1,453,948	$	(138,923	)
	Frontier Select Fund
Investments in Unconsolidated Trading Companies	$	(67,355	)

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Swaps Contracts

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Swaps Contracts

4. Swaps Contracts

In addition to authorizing Trading Advisors to manage pre-determined investment levels of futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities.

The Trust’s investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of the Trust and to provide access to programs and advisors that would not be otherwise available to the Trust and are not used for hedging purposes.

The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of March 31, 2019 and December 31, 2018, approximately 1.82% or $1,180,900 and 1.46% or $1,180,900 respectively, of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as Swap Contracts, at fair value on the Consolidated Statements of Financial Condition of the Trust. This cash held with the counterparty is not restricted.

The Trust strategically invests assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of the Trust will be invested will not own any of the investments or indices referenced by any swap entered into by the Trust. In addition, neither the swap counterparty nor any advisor referenced by any such swap is a Trading Advisor to the Trust.

The Trust had invested in the following swap contracts as of and for the three months ended March 31, 2019:  

	XXXIV Balanced select swap			XXXV Diversified select swap			XXXVII L/S select swap			Brevan Howard
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,513,721		$	5,747,765		$	431,716		$	1,926,299
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	(195,186	)	$	(86,648	)	$	(17,436	)	$	(50,194	)
Fair Value as of December 31, 2018	$	10,599,721		$	5,833,765		$	461,666		$	2,905,249
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	$	(115,000	)	$	(1,900,000	)

The Trust had invested in the following swap contracts as of and for the year ended December 31, 2018:

	XXXIV Balanced select swap			XXXV Diversified select swap			XXXVII L/S select swap			Brevan Howard
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,708,908		$	5,834,414		$	449,152		$	1,976,494
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	1,453,948		$	643,941		$	82,063		$	(138,924	)
Fair Value as of December 31, 2018	$	10,794,908		$	5,920,414		$	479,102		$	2,955,444
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	$	(115,000	)	$	(1,900,000	)

The Series of the Frontier Funds [Member]

Swaps Contracts

4. Swap Contracts

In addition to authorizing Trading Advisors to manage pre-determined investment levels of futures, option on futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities.

Each Series’ investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of each Series and to provide access to programs and advisors that would not be otherwise available to the Series, and are not used for hedging purposes.

The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of March 31, 2019, and December 31, 2018, approximately 1.8% and 1.6%, respectively, of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as collateral within the swap fair value within the statement of financial condition. The cash held with the counterparty is not restricted.

The Series may strategically invest assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of these Series will be invested will not own any of the investments or indices referenced by any swap entered into by these Series. In addition, neither the swap counterparty to the Trading Company of these Series nor any advisor referenced by any such swap is a Trading Advisor to these Series.

To help to reduce counterparty risk on the Series, the Managing Owner has the right to reduce the Series’ exposure and remove cash from the Series’ total return swaps with Deutsche Bank AG. This cash holding shall be in excess of $250,000 and may not exceed 40% of the Index exposure in total. Index exposure is defined as the total notional amount plus any profit. The Series are charged interest on this cash holding and any amount removed will be offset against the final settlement value of the swap. As of March 31, 2019, the Frontier Balanced Fund, the Frontier Diversified Fund, the Frontier Long/Short Commodity Fund and Frontier Heritage Fund, had $6,176,555, $4,000,000, $115,000, and $1,900,000, respectively, in cash holdings as shown in the Series’ Statements of Financial Conditions under advance on unrealized swap appreciation, which relates to the Trading Companies’ total return swaps with Deutsche Bank AG.

The Series have invested in the following swaps as of and for the three months ended March 31, 2019:

	Frontier Balanced Fund			Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Heritage Fund
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,513,721		$	5,747,765		$	431,716		$	1,926,299
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	(195,186	)	$	(86,648	)	($	17,436	)	$	(50,194	)
Fair Value as of December 31, 2018	$	10,599,721		$	5,833,765		$	461,666		$	2,905,249
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	($	115,000	)	$	(1,900,000	)

The Series have invested in the following swaps as of and for the year ended December 31, 2018:

	Frontier Balanced Fund			Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Heritage Fund
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,708,908		$	5,834,414		$	449,152		$	1,976,494
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	1,453,948		$	643,941		$	82,063		($	138,924	)
Fair Value as of December 31, 2018	$	10,794,908		$	5,920,414		$	479,102		$	2,955,444
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	($	115,000	)	($	1,900,000	)

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Investments in Private Investment Companies

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Investments in Private Investment Companies/Investments in Unconsolidated Trading Companies and Private Investment Companies

5. Investments in Private Investment Companies

Investments in private investment companies represent cash and open trade equity invested in the private investment companies as well as the cumulative trading profits or losses allocated to the Trust by the private investment companies. Private investment companies allocate trading profits or losses on the basis of the proportion of the Trust’s capital allocated for trading to each respective private investment company, which bears no relationship to the amount of cash invested by the Trust in the private investment companies. Investments in private investment companies are valued using the NAV provided by the underlying private investment.

The Galaxy Plus entities are made up of feeder funds in which the Trust invests and master trading entities into which the feeder funds invest. No investment held by the Galaxy Plus master trading entity is greater than 5% of the Trust’s total capital.

The following table summarizes the Trust’s equity in earnings from each of the private investment companies during the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31, 2019												Three Months Ended March 31, 2018
	Trading Commissions			Realized Gain/(Loss)			Change in Unrealized Gain/(Loss)			Net Income (Loss)			Trading Commissions			Realized Gain/(Loss)			Change in Unrealized Gain/(Loss)			Net Income (Loss)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(110,373	)		613,319			1,452,650			1,955,596			(49,914	)		(71,608	)		(87,591	)		(209,113	)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			(76,396	)		68,413			(7,983	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(18,647	)		59,373			(107,028	)		(66,302	)		(26,783	)		(433,944	)		62,280			(398,447	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(165,783	)		4,669,951			(5,454,164	)		(949,996	)		(242,357	)		1,839,882			(1,824,122	)		(226,597	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(18,698	)		1,225,553			180,282			1,387,137			(29,780	)		(624,013	)		106,684			(547,109	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(55,629	)		(55,629	)		-			-			146,610			146,610
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(48,694	)		(997,030	)		16,340			(1,029,384	)		(57,285	)		(1,369,079	)		(538,899	)		(1,965,263	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(38,565	)		34,869			(22,524	)		(26,220	)		(67,063	)		114,702			(8,659	)		38,980
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(9,226	)		(15,734	)		57,714			32,754			(14,370	)		24,498			(44,246	)		(34,118	)
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC		-			-			(31,483	)		(31,483	)		-			-			(27,611	)		(27,611	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(47,947	)		(122,096	)		13,721			(156,322	)		(75,103	)		(197,579	)		(405,904	)		(678,586	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(108,847	)		(323,299	)		286,321			(145,825	)		(299,641	)		(4,386,243	)		300,352			(4,385,532	)
Total	$	(566,780	)	$	5,144,906		$	(3,663,800	)	$	914,326			(862,296	)	$	(5,179,780	)	$	(2,252,693	)	$	(8,294,769	)

The Trust’s investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table:

	Redemptions Notice Period	Redemptions Permitted	Liquidity Restrictions
Frontier Funds
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund  (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None

The Series of the Frontier Funds [Member]

Investments in Private Investment Companies/Investments in Unconsolidated Trading Companies and Private Investment Companies

5. Investments in Unconsolidated Trading Companies and Private Investment Companies

Investments in unconsolidated Trading Companies and private investment companies represent cash and open trade equity invested in the Trading and private investment companies as well as by each Series and cumulative trading profits or losses allocated to each Series by the Trading Companies and private investment companies. Trading Companies and private investment companies allocate trading profits or losses on the basis of the proportion of each Series' capital allocated for trading to each respective Trading Company, which bears no relationship to the amount of cash invested by a Series in the Trading Company and private investment companies. The Trading Companies are valued using the equity method of accounting, which approximates fair value. Investments in private investment companies are valued using the NAV provided by the underlying private investment.

The Galaxy Plus entities are made up of feeder funds in which the Series invests and master trading entities into which the feeder funds invest. No investment held by the Galaxy Plus master trading entity is greater than 5% of any Series total capital.

The following table summarizes each of the Series' investments in unconsolidated Trading Companies as of March 31, 2019 and December 31, 2018:

	As March 31, 2019					As of December 31, 2018
	Percentage					Percentage
	of Series					of Series
	Total Capital Invested in					Total Capital Invested in
Series	Unconsolidated Trading Companies			Fair Value		Unconsolidated Trading Companies			Fair Value
Frontier Diversified Series — Frontier Trading Companies II and XXXVIII		0.14	%	$	19,736		7.19	%	$	1,160,910
Frontier Masters Fund --- Frontier Trading Companies II and XXXVIII		0.30	%	$	15,106		13.91	%	$	775,088
Frontier Long/Short Commodity Fund --- Frontier Trading Company XXXVIII		1.12	%	$	23,927		1.15	%	$	28,163
Frontier Balanced Fund --- Frontier Trading Companies II and XXXVIII		0.27	%	$	73,545		5.48	%	$	1,744,999
Frontier Select Fund --- Frontier Trading Companies XXXVIII and XXXIX		13.63	%	$	500,149		13.56	%	$	523,180
Frontier Global Fund --- Frontier Trading Companies II and XXXVIII		4.27	%	$	319,038		52.30	%	$	4,292,075
Frontier Heritage Fund --- Frontier Trading Companies II and XXXVIII		0.72	%	$	31,389		16.27	%	$	726,686

The following tables summarize each of the Series' equity in earnings from unconsolidated Trading Companies and private investment companies for the three months ended March 31, 2019 and 2018. 

	Three Months Ended March 31, 2019															Three Months Ended March 31, 2018
	Trading			Realized			Change in Unrealized			Net Income			Trading			Realized			Change in Unrealized			Net Income
	Commissions			Gain/(Loss)			Gain/(Loss)			(Loss)			Commissions			Gain/(Loss)			Gain/(Loss)			(Loss)
Frontier Balanced Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(139,281	)	$	(139,281	)	$	-		$	-		$	(303,227	)	$	(303,227	)
Frontier Trading Company XXXVIII, LLC		-			-			1,011			1,011			-			-			(4,595	)		(4,595	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(14,414	)		134,933			463,481			584,000			(33,442	)		(53,706	)		(65,693	)		(152,841	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(10,613	)		36,954			(66,548	)		(40,207	)		(16,672	)		(289,977	)		39,719			(266,930	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(68,811	)		2,295,369			(2,658,416	)		(431,858	)		(87,246	)		799,734			(791,836	)		(79,348	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(8,968	)		765,891			110,042			866,965			(20,107	)		(471,750	)		73,955			(417,902	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(18,750	)		(18,750	)		-			-			35,643			35,643
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(28,901	)		(608,323	)		5,649			(631,575	)		(35,900	)		(900,196	)		(363,122	)		(1,299,218	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(25,311	)		24,230			(15,747	)		(16,828	)		(41,561	)		76,468			(5,773	)		29,134
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(4,268	)		(10,217	)		27,339			12,854			(6,723	)		11,076			(22,123	)		(17,770	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(24,512	)		(185,443	)		41,574			(168,381	)		(73,636	)		(1,587,857	)		120,046			(1,541,447	)
Total	$	(185,798	)	$	2,453,394		$	(2,249,646	)	$	17,950		$	(315,287	)	$	(2,416,208	)	$	(1,287,006	)	$	(4,018,501	)
Frontier Global Fund —
Frontier Trading Company II LLC	$	-		$	-		$	(313,867	)	$	(313,867	)	$	-		$	-		$	(992,595	)	$	(992,595	)
Frontier Trading Company XXXVIII, LLC		-			-			(14,396	)		(14,396	)		-			-			(37,082	)		(37,082	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(54,326	)		265,913			476,520			688,107			-			-			-			-
Total	$	(54,326	)	$	265,913		$	148,257		$	359,844		$	-		$	-		$	(1,029,677	)	$	(1,029,677	)
Frontier Frontier Select Fund —
Frontier Trading Company XXXIX, LLC	$	-		$	-		$	(24,336	)	$	(24,336	)	$	-		$	-		$	-		$	-
Frontier Trading Company XXXVIII, LLC		-			-			(1,137	)		(1,137	)		-			-			5,578			5,578
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(15,472	)		32,894			83,870			101,292			(50,983	)		(548,310	)		30,050			(569,243	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(24,314	)		(53,259	)		8,099			(69,474	)		(37,496	)		(82,277	)		(191,609	)		(311,382	)
Total	$	(39,786	)	$	(20,365	)	$	66,496		$	6,345		$	(88,479	)	$	(630,587	)	$	(155,981	)	$	(875,047	)
Frontier Heritage Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(54,170	)	$	(54,170	)	$	-		$	-		$	(122,535	)	$	(122,535	)
Frontier Trading Company XXXVIII, LLC		-			-			(2,782	)		(2,782	)		-			-			(967	)		(967	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(17,028	)		62,603			154,712			200,287			-			-			-			-
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(28,077	)		(57,672	)		19,541			(66,208	)		(52,775	)		(544,577	)		56,882			(540,470	)
Total	$	(45,105	)	$	4,931		$	117,301		$	77,127		$	(52,775	)	$	(544,577	)	$	(66,620	)	$	(663,972	)
Frontier Long/Short Commodity Fund
Frontier Trading Company XXXVIII, LLC	$	-		$	-		$	(560	)	$	(560	)	$	-		$	-		$	58		$	58
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			-			-			-
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(14,831	)		257,430			(307,997	)		(65,398	)		(29,775	)		170,180			(161,895	)		(21,490	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(29,334	)		(29,334	)		-			-			93,458			93,458
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(12,286	)		(26,402	)		(1,661	)		(40,349	)		(25,584	)		(229,565	)		16,878			(238,271	)
Total	$	(27,117	)	$	231,028		$	(339,552	)	$	(135,641	)	$	(55,359	)	$	(59,385	)	$	(51,501	)	$	(166,245	)
Frontier Diversified Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(75,905	)	$	(75,905	)	$	-		$	-		$	(150,626	)	$	(150,626	)
Frontier Trading Company XXXVIII, LLC		-			-			(8,593	)		(8,593	)		-			-			983			983
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(10,457	)		87,032			227,597			304,172			(16,472	)		(17,902	)		(21,898	)		(56,272	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(8,034	)		22,419			(40,480	)		(26,095	)		(10,111	)		(143,967	)		22,561			(131,517	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(41,832	)		1,211,166			(1,421,023	)		(251,689	)		(46,698	)		399,867			(395,918	)		(42,749	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(9,730	)		459,662			70,240			520,172			(9,673	)		(152,263	)		32,729			(129,207	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(7,545	)		(7,545	)		-			-			17,509			17,509
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(19,793	)		(388,707	)		10,691			(397,809	)		(21,385	)		(468,883	)		(175,777	)		(666,045	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(13,254	)		10,639			(6,777	)		(9,392	)		(25,502	)		38,234			(2,886	)		9,846
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(4,958	)		(5,517	)		30,375			19,900			(7,647	)		11,076			(22,123	)		(18,694	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(17,724	)		(81,241	)		57,554			(41,411	)		(40,732	)		(776,278	)		46,407			(770,603	)
Total	$	(125,782	)	$	1,315,453		$	(1,163,866	)	$	25,805		$	(178,220	)	$	(1,110,116	)	$	(649,039	)	$	(1,937,375	)
Frontier Masters Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(61,450	)	$	(61,450	)	$	-		$	-		$	(241,769	)	$	(241,769	)
Frontier Trading Company XXXVIII, LLC		-			-			223			223			-			-			8,414			8,414
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			(76,396	)		68,413			(7,983	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(14,148	)		62,838			130,340			179,030			-			-			-			-
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(40,309	)		905,986			(1,066,728	)		(201,051	)		(78,638	)		470,101			(474,473	)		(83,010	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(10,776	)		(5,435	)		85,443			69,232			(55,931	)		(699,656	)		30,089			(725,498	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(23,633	)		(68,837	)		5,622			(86,848	)		(37,607	)		(115,302	)		(214,295	)		(367,204	)
Total	$	(88,866	)	$	894,552		$	(906,550	)	$	(100,864	)	$	(172,176	)	$	(421,253	)	$	(823,621	)	$	(1,417,050	)

The Series' investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table:

	Redemptions	Redemptions	Liquidity
	Notice Period	Permitted	Restrictions
Frontier Diversified Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None
Frontier Masters Fund
Trend Following
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Long/Short Commodity Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Balanced Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None
Frontier Select Fund
Trend Following
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Multi-Strategy
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Heritage Fund
Multi-Strategy
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Global Fund
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None

XML

Transactions with Affiliates

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Transactions with Affiliates

6. Transactions with Affiliates

The Managing Owner contributes funds to the Trust in order to have a 1% interest in the aggregate capital, profits and losses and in return will receive units designated as general units in the Series of the Trust in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no advisory fees or management advisory fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner is required to maintain at least a 1% interest ("Minimum Purchase Commitment") in the aggregate capital, profits and losses of the Trust so long as it is acting as the Managing Owner of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP Units and Frontier Balanced Fund Class 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund, and Frontier Masters Fund. The 1% interest in these specific Series of the Trust is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, as well. All units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates.

Expenses

Management Fees—Each Series of Units pays to the Managing Owner a monthly management fee equal to a percentage of the notional assets of such Series allocated to Trading Companies, calculated on a daily basis. The percentage basis of the fees varies and are in line with the amounts being disclosed below. In addition, the Managing Owner receives a monthly management equal to a certain percentage of the assets in the Galaxy Plus entities attributable to such Series' (including notional assets), calculated on a monthly basis. The management fees attributable to Galaxy Plus entities are included in unrealized gain/(loss) on private investment companies on the Consolidated Statements of Operations. The total amount of assets of a Series allocated to Trading Advisors and/or reference programs, including (i) actual funds deposited in accounts directed by the Trading Advisors or deposited as margin in respect of swaps or other derivative instruments referencing a reference program plus (ii) any notional equity allocated to the Trading Advisors and any reference programs, is referred to herein as the "notional assets" of the Series. The annual rate of the management fee is: 0.5% for the Frontier Balanced Fund Class 1 and Class 2, 1.0% for the Frontier Balanced Fund Class 1AP, Class 2a and Class 3a, 2.0% for the Frontier Global Fund, Frontier Long/Short Commodity Fund Class 1a, Class 2a and Class 3a and Frontier Masters Fund, 0.75% for Frontier Diversified Fund, 2.5% for the Frontier Heritage Fund and Frontier Select Fund, and 3.5% for the Frontier Long/Short Commodity Fund Class 2 and Class 3. The Managing Owner may pay all or a portion of such management fees to the Trading Advisor(s) and/or waive (up to the percentage specified) any such management fee to the extent any related management fee is paid by a trading company or estimated management fee is embedded in a swap or other derivative instrument. Any management fee embedded in a swap or other derivative instrument may be greater or less than the management fee that would otherwise be charged to the Series by the Managing Owner. As of the date of this report, for a Series that has invested in a swap, the Managing Owner or Trading Advisor(s) do not receive any management fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of March 31, 2019 and December 31, 2018, the range of management fees embedded based on fair value of swaps in (i) swaps owned by Frontier Diversified Fund was 1.00% per annum, (ii) swaps owned by Frontier Balanced Fund was 1.00% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 1.50% per annum, and (iv) swaps owned by Frontier Heritage Fund was 1.00% per annum, and the Managing Owner has waived the entire management fee due to it from those Series in respect of such Series' investment in swaps. In each case, the embedded management fee was accrued on the relevant notional amount of the swap.

The management fee as a percentage of the applicable Series' notional assets will be greater than the percentage of the applicable Series' net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility.

Trading Fees— In connection with each Series' trading activities the Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund pays to the Managing Owner an FCM fee of up to 2.25% per annum of notional assets allocated to the trading advisors, including through investments in commodity pools available on the Galaxy Plus Platform, and any reference programs of the applicable Series. The Frontier Diversified Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund pays to the Managing Owner an FCM fee of up to 2.25% of notional assets allocated to the trading advisors, including through investments in commodity pools available on the Galaxy Plus Platform, and a custodial/due diligence fee of 0.12% of such Series' NAV, calculated daily.

Incentive Fees— Some Series pay to the Managing Owner an incentive fee of a certain percentage of new net trading profits generated in the Trading Companies by such Series, monthly or quarterly. In addition, the Managing Owner receives a quarterly incentive fee of a certain percentage of new net trading profits generated in the Galaxy Plus entities that have been allocated to the Series. The incentive fees attributable to Galaxy Plus entities are included in unrealized gain/(loss) on private investment companies on the Consolidated Statements of Operations. Because the Frontier Balanced Fund, Frontier Diversified Fund, Frontier Masters Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Long/Short Commodity Fund may each employ multiple Trading Advisors, these Series will pay the Managing Owner a monthly incentive fee calculated on a Trading Advisor by Trading Advisor basis. It is therefore possible that in any given period the Series may pay incentive fees to the Managing Owner for one or more Trading Advisors while each of these Series as a whole experiences losses. The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund, Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund. The Managing Owner may pay all or a portion of such incentive fees to the Trading Advisor(s) for such Series. As of the date of this report, for a Series that has invested in a swap, the Managing Owner or Trading Advisor(s) do not receive any incentive fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of March 31, 2019, the range of incentive fees as a percentage of net new trading profits on swaps embedded in (i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series' investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.

Service Fees—In addition, with respect to Class 1 and Class 1a Units of each Series of the Trust, as applicable, the Series pays monthly or quarterly to the Managing Owner a service fee of up to 3% and 2% annually, for the closed Series and open Series, respectively, which the Managing Owner pays to selling agents of the Trust. With respect to Class 2 Units of each Series of the Trust, as applicable, the Series pays monthly or quarterly to the Managing Owner a service fee of up to 0.25% annually, for the closed Series and open Series, respectively, which the Managing Owner pays to selling agents of the Trust.

As of March 31, 2019, the Trust had a payable to the Managing Owner in the amounts of $0, $8,966, $7,397, $78,790, $15,267 and $196,162 for incentive fees, management fees, interest, service fees, risk analysis fees, and trading fees, respectively.

As of December 31, 2018, the Trust had a payable to the Managing Owner in the amounts of $10,897, $78,045, $10,852, $222,241, and $96,152 for incentive fees, management fees, interest, trading fees, and service fees, respectively.

For the three months ended March 31, 2019 the Trust paid the Managing Owner $0, $51,677, $6,692, $291,355 and $583,251 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively.

For the three months ended March 31, 2018 the Trust paid the Managing Owner $148,409, $230,889, $22,798, $465,780 and $870,525 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively.

With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. For the three months ended March 31, 2019 and 2018, amounts received or receivable from the Managing Owner for the difference in monthly service fees from the prepaid initial service fees were $0 and $0, respectively.

Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a, Class 3a only) 100% of the interest is retained by the respective Series. During the three months ended March 31, 2019 and 2018, the Trust paid $25,609 and $55,400, respectively, of such interest income to the Managing Owner. Such amounts are not included in the Consolidated Statement of Operations of the Trust. All other interest income is recorded by the Trust on the Consolidated Statement of Operations.

The Series of the Frontier Funds [Member]

Transactions with Affiliates

6. Transactions with Affiliates

The Managing Owner contributes funds to the Trust, with respect to the Series, in order to have a 1% interest ("Minimum Purchase Commitment") in the aggregate capital, profits and losses of all Series and in return will receive units designated as general units in the Series in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no management fees or management fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP and 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund and Frontier Masters Fund. The 1% interest in these specific Series is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, with respect to the Series, as well. All Units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates.

Expenses

Management Fees—Each Series of Units pays to the Managing Owner a monthly management fee equal to a percentage of the notional assets of such Series allocated to Trading Companies, calculated on a daily basis. The percentage basis of the fees varies and are in line with the amounts being disclosed below. In addition, the Managing Owner receives a monthly management fee equal to a certain percentage of the assets in the Galaxy Plus entities attributable to such Series' (including notional assets), calculated on a monthly basis. The management fees attributable to Galaxy Plus entities are included in unrealized gain/(loss) on private investment companies on the Statements of Operations. The total amount of assets of a Series allocated to Trading Advisors and/or reference programs, including (i) actual funds deposited in accounts directed by the Trading Advisors or deposited as margin in respect of swaps or other derivative instruments referencing a reference program plus (ii) any notional equity allocated to the Trading Advisors and any reference programs, is referred to herein as the "notional assets" of the Series. The annual rate of the management fee is: 0.5% for the Frontier Balanced Fund Class 1 and Class 2, 0.5% for the Frontier Balanced Fund Class 1AP, Class 2a and Class 3a, 2.0% for the Frontier Global Fund, Frontier Long/Short Commodity Fund Class 1a, Class 2a, and Class 3a and Frontier Masters Fund, 0.75% for Frontier Diversified Fund, 2.5% for the Frontier Heritage Fund and Frontier Select Fund, and 3.5% for the Frontier Long/Short Commodity Fund Class 2 and Class 3. The Managing Owner may pay all or a portion of such management fees to the Trading Advisor(s) and/or waive (up to the percentage specified) any such management fee to the extent any related management fee is paid by a trading company or estimated management fee is embedded in a swap or other derivative instrument. Any management fee embedded in a swap or other derivative instrument may be greater or less than the management fee that would otherwise be charged to the Series by the Managing Owner.

As of the date of this report, for a Series that has invested in a swap, a Trading Advisor does not receive any management fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of March 31, 2019 and December 31, 2018, the management fee embedded in (i) swaps owned by Frontier Diversified Fund was 1.00% per annum, (ii) swaps owned by Frontier Balanced Fund was 1.00% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 1.50% per annum, (iv) swaps owned by Frontier Select Fund was 1.00% per annum, and (v) swaps owned by Frontier Heritage Fund was 1.00% per annum, and the Managing Owner has waived the entire management fee due to it from those Series in respect of such Series' investment in swaps. In each case, the embedded management fee was accrued on the relevant notional amount of the swap.

The management fee as a percentage of the applicable Series' notional assets will be greater than the percentage of the applicable Series' net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility.

Trading Fees— In connection with each Series' trading activities the Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund pays to the Managing Owner an FCM fee of up to 2.25% per annum of notional assets allocated to the trading advisors, including through investments in commodity pools available on the Galaxy Plus Platform, and any reference programs of the applicable Series. The Frontier Diversified Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund pays to the Managing Owner an FCM fee of up to 2.25% of notional assets allocated to the trading advisors, including through investments in commodity pools available on the Galaxy Plus Platform, and a custodial/due diligence fee of 0.12% of such Series' NAV, calculated daily.

Incentive Fees—Some Series pay to the Managing Owner an incentive fee of a certain percentage of new net trading profits generated in the Trading Companies by such Series, monthly or quarterly. In addition, the Managing Owner receives a quarterly incentive fee of a certain percentage of new net trading profits generated in the Galaxy Plus entities that have been allocated to the Series. The incentive fees attributable to Galaxy Plus entities are included in unrealized gain/(loss) on private investment companies on the Statements of Operations. Because the Frontier Diversified Fund, Frontier Masters Fund, Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Long/Short Commodity Fund may each employ multiple Trading Advisors, these Series will pay the Managing Owner a monthly incentive fee calculated on a Trading Advisor by Trading Advisor basis. It is therefore possible that in any given period the Series may pay incentive fees to the Managing Owner for one or more Trading Advisors while each of these Series as a whole experiences losses. The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund, Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund. The Managing Owner may pay all or a portion of such incentive fees to the Trading Advisor(s) for such Series. As of the date of this report, for a Series that has invested in a swap, the Managing Owner or Trading Advisor(s) do not receive any incentive fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of March 31, 2019 and December 31, 2018, the range of incentive fees as a percentage of net new trading profits on swaps embedded in (i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series' investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.

Service Fees— Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.

The Managing Owner has determined that the purchase of additional units of the relevant series will commence in 2019. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $26,419, $31,999, $143, $283,754, $12,874, $142,468 and $51,039 for the Frontier Diversified, Masters, Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively.

The following table summarizes fees earned by the Managing Owner for the three months ended March 31, 2019 and 2018:

Three Months Ended March 31, 2019	Incentive (Rebate) Fees		Management Fee		Service Fee		Trading Fee
Frontier Diversified Fund	$	-	$	2,668	$	12,029	$	130,304
Frontier Masters Fund		-		5,593		7,486		67,318
Frontier Long/Short Commodity Fund		-		-		162		13,852
Frontier Balanced Fund		-		8,079		170,865		279,337
Frontier Select Fund		-		-		25,505		22,632
Frontier Global Fund		-		29,148		52,123		42,715
Frontier Heritage Fund		-		6,189		23,185		27,093

Three Months Ended March 31, 2018	Incentive (Rebate) Fees		Management  Fee		Service Fee		Trading Fee
Frontier Diversified Fund	$	1,881	$	11,563	$	16,115	$	165,150
Frontier Masters Fund		-		32,349		14,969		134,048
Frontier Long/Short Commodity Fund		-		-		657		24,693
Frontier Balanced Fund		145,134		20,336		262,981		384,176
Frontier Select Fund		-		-		39,689		37,594
Frontier Global Fund		-		130,660		94,260		82,258
Frontier Heritage Fund		1,394		35,981		37,108		42,292

The following table summarizes fees payable to the Managing Owner as of March 31, 2019 and December 31, 2018.

As of March 31, 2019
	Incentive Fees		Management Fees		Interest Fees		Service Fees		Trading Fees
Frontier Diversified Fund	$	-	$	-	$	-	$	2,490	$	42,268
Frontier Masters Fund		-		-		-		1,287		23,323
Frontier Long/Short Commodity Fund		-		-		-		7		4,103
Frontier Balanced Fund		-		8,966		1,237		47,153		88,587
Frontier Select Fund		-		-		37		7,907		7,483
Frontier Global Fund		-		-		5,504		13,888		19,141
Frontier Heritage Fund		-		-		619		6,058		11,257

As of December 31, 2018
	Incentive Fees		Management Fees		Interest Fees		Service Fees		Trading Fees
Frontier Diversified Fund	$	10,897	$	3,875	$	-	$	4,498	$	44,827
Frontier Masters Fund		-		8,347		-		1,750		27,984
Frontier Long/Short Commodity Fund		-		-		-		51		5,306
Frontier Balanced Fund		-		13,917		1,490		56,791		101,770
Frontier Select Fund		-		-		-		8,575		7,812
Frontier Global Fund		-		42,705		8,124		17,803		24,353
Frontier Heritage Fund		-		9,201		1,238		6,684		10,189

With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. There were no amounts receivable from the Managing Owner for any differences resulting from service fees.

Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, and Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a) 100% of the interest is retained by the respective Series.

The following table outlines the interest paid by each Series to the Managing Owner and its ratio to average net assets for the three months ended March 31, 2019 and 2018:

	March 31, 2019		March 31, 2018		March 31, 2019			March 31, 2018
	Gross Amount Paid to the		Gross Amount Paid to the		Ratio to Average			Ratio to Average
	Managing Owner		Managing Owner		Net Assets			Net Assets
Frontier Diversified Fund Class 1	$	-	$	-		0.00	%		0.00	%
Frontier Diversified Fund Class 2		-		-		0.00	%		0.00	%
Frontier Diversified Fund Class 3		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 1		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 2		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 3		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 2		6		50		0.00	%		0.02	%
Frontier Long/Short Commodity Fund Class 3		127		541		0.01	%		0.02	%
Frontier Long/Short Commodity Fund Class 1a		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 2a		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 3a		-		-		0.00	%		0.00	%
Frontier Balanced Fund Class 1		1,731		11,898		0.01	%		0.03	%
Frontier Balanced Fund Class 1AP		26		192		0.01	%		0.03	%
Frontier Balanced Fund Class 2		323		2,138		0.01	%		0.03	%
Frontier Balanced Fund Class 2a		4		45		0.00	%		0.01	%
Frontier Balanced Fund Class 3a		13		127		0.00	%		0.01	%
Frontier Select Fund Class 1		859		2,460		0.01	%		0.05	%
Frontier Select Fund Class 1AP		-		10		0.00	%		0.04	%
Frontier Select Fund Class 2		30		366		0.01	%		0.05	%
Frontier Global Fund Class 1		18,729		28,689		0.27	%		0.22	%
Frontier Global Fund Class 1AP		84		83		0.27	%		0.22	%
Frontier Global Fund Class 2		1,034		3,777		0.26	%		0.23	%
Frontier Heritage Fund Class 1		2,228		4,383		0.07	%		0.09	%
Frontier Heritage Fund Class 1AP		1		5		0.10	%		0.09	%
Frontier Heritage Fund Class 2		414		636		0.07	%		0.09	%
Total	$	25,609	$	55,400

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Financial Highlights

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Financial Highlights

7. Financial Highlights

The following information presents the financial highlights of the Trust for the three months ended March 31, 2019 and 2018. This data has been derived from the information presented in the consolidated financial statements.

Three months ended March 31	2019			2018
Ratios to average net assets (1)
Net investment income/(loss) (1)		-5.42	%		-5.99	%
Expenses before incentive fees (3) (4)		5.69	%		6.08	%
Expenses after incentive fees (3) (4)		5.69	%		6.22	%
Total return before incentive fees (2)		-1.61	%		-9.55	%
Total return after incentive fees (2)		-1.61	%		-9.69	%

(1) Annualized with the exception of incentive fees.

(2) Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5.

(4) Does not include management and incentive fees at Galaxy Plus.

The Trust financial highlights are calculated based upon the Trust's consolidated financial statements. The consolidated Trust does not issue units and therefore the financial highlights do not disclose any unitized data.

The Series of the Frontier Funds [Member]

Financial Highlights

7. Financial Highlights

The following information presents the financial highlights of the Trust, with respect to the Series, for the three months ended March 31, 2019 and 2018.

	Frontier Diversified Fund									Frontier Masters Fund									Frontier Long/Short Commodity Fund
	Class 1			Class 2			Class 3			Class 1			Class 2			Class 3			Class 1a			Class 2			Class 2a			Class 3			Class 3a
Per unit operating performance (1)
Net asset value, December 31, 2018	$	102.25		$	120.84		$	112.62		$	91.10		$	107.68		$	100.77		$	56.80		$	98.82		$	66.52		$	103.66		$	69.83
Net operating results:
Interest income		0.03			0.04			0.04			0.01			0.01			0.01			0.02			0.03			0.02			0.03			0.02
Expenses		(1.63	)		(1.05	)		(0.98	)		(1.69	)		(1.46	)		(1.37	)		(0.77	)		(0.59	)		(0.37	)		(0.62	)		(0.39	)
Net gain/(loss) on investments, net of non-controlling interests		0.19			(0.14	)		(0.06	)		(1.23	)		(1.54	)		(1.37	)		(5.90	)		(4.59	)		(7.21	)		(4.82	)		(7.49	)
Net income/(loss)		(1.41	)		(1.15	)		(1.00	)		(2.91	)		(2.99	)		(2.73	)		(6.66	)		(5.15	)		(7.56	)		(5.41	)		(7.87	)
Net asset value, March 31, 2019	$	100.84		$	119.69		$	111.62		$	88.19		$	104.69		$	98.04		$	50.14		$	93.67		$	58.96		$	98.25		$	61.96
Ratios to average net assets
Net investment income/(loss)		-6.58	%		-3.51	%		-3.51	%		-8.08	%		-5.87	%		-5.87	%		-6.28	%		-2.46	%		-2.46	%		-2.46	%		-2.46	%
Expenses before incentive fees (3)(4)		6.71	%		3.64	%		3.64	%		8.14	%		5.93	%		5.93	%		6.41	%		2.60	%		2.60	%		2.60	%		2.60	%
Expenses after incentive fees (3)(4)		6.71	%		3.64	%		3.64	%		8.14	%		5.93	%		5.93	%		6.41	%		2.60	%		2.60	%		2.60	%		2.60	%
Total return before incentive fees (2)		-1.38	%		-0.95	%		-0.89	%		-3.19	%		-2.78	%		-2.71	%		-11.73	%		-5.21	%		-11.37	%		-5.22	%		-11.27	%
Total return after incentive fees (2)		-1.38	%		-0.95	%		-0.89	%		-3.19	%		-2.78	%		-2.71	%		-11.73	%		-5.21	%		-11.37	%		-5.22	%		-11.27	%

	Frontier Balanced Fund															Frontier Select Fund
	Class 1			Class 1AP			Class 2			Class 2a			Class 3a			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2018	$	117.63		$	134.16		$	180.94		$	156.81		$	156.26		$	71.41		$	82.48		$	108.18
Net operating results:
Interest income		0.04			0.05			0.07			0.06			0.06			0.00			0.00			0.00
Expenses		(1.97	)		(1.29	)		(1.74	)		(1.51	)		(1.51	)		(0.92	)		(0.49	)		(0.65	)
Net gain/(loss) on investments, net of non-controlling interests		(0.82	)		(0.91	)		(1.22	)		(1.09	)		(1.03	)		0.27			0.31			0.46
Net income/(loss)		(2.74	)		(2.15	)		(2.90	)		(2.54	)		(2.48	)		(0.65	)		(0.18	)		(0.19	)
Net asset value, March 31, 2019	$	114.89		$	132.01		$	178.04		$	154.27		$	153.78		$	70.76		$	82.30		$	107.99
Ratios to average net assets
Net investment income/(loss)		-6.90	%		-3.90	%		-3.90	%		-3.90	%		-3.90	%		-5.58	%		-2.58	%		-2.58	%
Expenses before incentive fees (3)(4)		7.06	%		4.06	%		4.06	%		4.06	%		4.06	%		5.58	%		2.58	%		2.58	%
Expenses after incentive fees (3)(4)		7.06	%		4.06	%		4.06	%		4.06	%		4.06	%		5.58	%		2.58	%		2.58	%
Total return before incentive fees (2)		-2.33	%		-1.60	%		-1.60	%		-1.62	%		-1.59	%		-0.91	%		-0.22	%		-0.18	%
Total return after incentive fees (2)		-2.33	%		-1.60	%		-1.60	%		-1.62	%		-1.59	%		-0.91	%		-0.22	%		-0.18	%

	Frontier Global Fund									Frontier Heritage Fund
	Class 1			Class 1AP			Class 2			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2018	$	131.57		$	149.92		$	187.17		$	99.83		$	111.78		$	152.53
Net operating results:
Interest income		0.00			0.00			0.00			0.00			0.00			0.00
Expenses		(2.19	)		(1.42	)		(1.77	)		(1.54	)		(0.97	)		(1.30	)
Net gain/(loss) on investments, net of non-controlling interests		6.95			8.00			10.08			1.39			1.63			2.23
Net income/(loss)		4.76			6.58			8.31			(0.15	)		0.66			0.93
Net asset value, March 31, 2019	$	136.33		$	156.50		$	195.48		$	99.68		$	112.44		$	153.46
Ratios to average net assets
Net investment income/(loss)		-6.91	%		-3.91	%		-3.91	%		-6.63	%		-3.63	%		-3.63	%
Expenses before incentive fees (3)(4)		6.91	%		3.91	%		3.91	%		6.63	%		3.63	%		3.63	%
Expenses after incentive fees (3)(4)		6.91	%		3.91	%		3.91	%		6.63	%		3.63	%		3.63	%
Total return before incentive fees (2)		3.62	%		4.39	%		4.44	%		-0.15	%		0.59	%		0.61	%
Total return after incentive fees (2)		3.62	%		4.39	%		4.44	%		-0.15	%		0.59	%		0.61	%

(1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.

(2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.

(4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.

	Frontier Diversified Fund									Frontier Masters Fund									Frontier Long/Short Commodity Fund
	Class 1			Class 2			Class 3			Class 1			Class 2			Class 3			Class 1a			Class 2			Class 2a			Class 3			Class 3a
Per unit operating performance (1)
Net asset value, December 31, 2017	$	116.41		$	135.19		$	125.68		$	114.74		$	133.27		$	124.40		$	81.35		$	115.81		$	93.59		$	121.50		$	97.99
Net operating results:
Interest income		0.04			0.05			0.05			0.09			0.10			0.09			0.08			0.11			0.09			0.12			0.10
Expenses		(1.82	)		(1.16	)		(1.08	)		(2.29	)		(1.98	)		(1.85	)		(1.20	)		(0.69	)		(0.56	)		(0.72	)		(0.59	)
Net gain/(loss) on investments, net of non-controlling interests		(8.10	)		(9.82	)		(9.06	)		(14.24	)		(16.72	)		(15.54	)		(2.37	)		(2.79	)		(3.17	)		(2.93	)		(3.26	)
Net income/(loss)		(9.88	)		(10.93	)		(10.09	)		(16.44	)		(18.60	)		(17.30	)		(3.49	)		(3.37	)		(3.64	)		(3.53	)		(3.75	)
Net asset value, March 31, 2018	$	106.53		$	124.26		$	115.59		$	98.30		$	114.67		$	107.10		$	77.86		$	112.44		$	89.95		$	117.97		$	94.24
Ratios to average net assets
Net investment income/(loss)		-6.45	%		-3.44	%		-3.44	%		-8.38	%		-6.10	%		-6.10	%		-5.43	%		-2.00	%		-2.00	%		-2.00	%		-2.00	%
Expenses before incentive fees (3)(4)		6.60	%		3.58	%		3.58	%		8.70	%		6.42	%		6.42	%		5.82	%		2.39	%		2.39	%		2.39	%		2.39	%
Expenses after incentive fees (3)(4)		6.61	%		3.59	%		3.59	%		8.70	%		6.42	%		6.42	%		5.82	%		2.39	%		2.39	%		2.39	%		2.39	%
Total return before incentive fees (2)		-8.48	%		-8.08	%		-8.02	%		-14.33	%		-13.96	%		-13.91	%		-4.29	%		-2.91	%		-3.89	%		-2.91	%		-3.83	%
Total return after incentive fees (2)		-8.49	%		-8.08	%		-8.03	%		-14.33	%		-13.96	%		-13.91	%		-4.29	%		-2.91	%		-3.89	%		-2.91	%		-3.83	%

	Frontier Balanced Fund															Frontier Select Fund
	Class 1			Class 1AP			Class 2			Class 2a			Class 3a			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2017	$	135.96		$	150.56		$	202.90		$	175.77		$	175.18		$	90.27		$	100.02		$	132.73
Net operating results:
Interest income		0.05			0.05			0.07			0.06			0.06			0.00			0.00			0.00
Expenses		(2.57	)		(1.79	)		(2.41	)		(2.10	)		(2.09	)		(1.15	)		(0.57	)		(0.76	)
Net gain/(loss) on investments, net of non-controlling interests		(8.51	)		(9.49	)		(12.68	)		(11.06	)		(11.03	)		(12.65	)		(14.09	)		(18.69	)
Net income/(loss)		(11.03	)		(11.23	)		(15.02	)		(13.10	)		(13.06	)		(13.80	)		(14.66	)		(19.45	)
Net asset value, March 31, 2018	$	124.93		$	139.33		$	187.88		$	162.67		$	162.12		$	76.47		$	85.36		$	113.28
Ratios to average net assets
Net investment income/(loss)		-6.89	%		-3.89	%		-3.89	%		-3.89	%		-3.89	%		-5.46	%		-2.46	%		-2.46	%
Expenses before incentive fees (3)(4)		6.71	%		3.72	%		3.72	%		3.72	%		3.72	%		5.46	%		2.46	%		2.46	%
Expenses after incentive fees (3)(4)		7.04	%		4.05	%		4.05	%		4.05	%		4.05	%		5.46	%		2.46	%		2.46	%
Total return before incentive fees (2)		-7.79	%		-7.13	%		-7.08	%		-7.13	%		-7.13	%		-15.29	%		-14.66	%		-14.65	%
Total return after incentive fees (2)		-8.11	%		-7.46	%		-7.40	%		-7.45	%		-7.46	%		-15.29	%		-14.66	%		-14.65	%

	Frontier Winton Fund									Frontier Heritage Fund
	Class 1			Class 1AP			Class 2			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2017	$	159.08		$	176.44		$	216.50		$	121.19		$	134.28		$	179.70
Net operating results:
Interest income		0.00			0.00			0.00			0.00			0.00			0.00
Expenses		(3.45	)		(2.55	)		(3.24	)		(2.46	)		(1.78	)		(2.38	)
Net gain/(loss) on investments, net of non-controlling interests		(11.03	)		(12.28	)		(16.50	)		(14.23	)		(15.86	)		(21.21	)
Net income/(loss)		(14.48	)		(14.83	)		(19.74	)		(16.69	)		(17.64	)		(23.59	)
Net asset value, March 31, 2018	$	144.60		$	161.61		$	196.76		$	104.50		$	116.64		$	156.11
Ratios to average net assets
Net investment income/(loss)		-8.98	%		-5.98	%		-5.98	%		-8.51	%		-5.52	%		-5.52	%
Expenses before incentive fees (3)(4)		8.98	%		5.98	%		5.98	%		8.49	%		5.50	%		5.50	%
Expenses after incentive fees (3)(4)		8.98	%		5.98	%		5.98	%		8.51	%		5.52	%		5.52	%
Total return before incentive fees (2)		-9.10	%		-8.41	%		-9.12	%		-13.75	%		-13.11	%		-13.10	%
Total return after incentive fees (2)		-9.10	%		-8.41	%		-9.12	%		-13.77	%		-13.14	%		-13.13	%

(1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.

(2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.

(4) Expense ratios do not include mangement and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.

XML

Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Derivative Instruments and Hedging Activities

8. Derivative Instruments and Hedging Activities

The Trust's primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Trust does not enter into or hold positions for hedging purposes as defined under ASC 815. The detail of the fair value of the Trust's derivatives by instrument types as of March 31, 2019 and December 31, 2018 is included in the Consolidated Condensed Schedules of Investments. See Note 4 for further disclosure related to the Trust's positions in swap contracts. There are embedded management fees in transacting these swaps ranging from 1% to 1.5% based on fair value of swaps and the embedded incentive fees ranging from 15% to 25% based on net new trading profits on swaps.

For the three months ended March 31, 2019 and March 31, 2018, the monthly average of forwards, options and futures contracts bought was approximately 274 and 322, respectively and sold was approximately 1,348 and 8,519, respectively.

The following tables summarize the trading revenues for the three months ended March 31, 2019 and 2018 by sector:

Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended March 31, 2019

Type of contract
Agriculturals	$	(59,562	)
Currencies		(500,661	)
Energies		(584,896	)
Interest rates		552,670
Metals		(617,340	)
Stock indices		(67,560	)
Realized trading income/(loss)(1)	$	(1,277,349	)

Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended March 31, 2018

Type of contract
Metals	$	175,869
Currencies		(333,820	)
Energies		(258,495	)
Agriculturals		(164,058	)
Interest rates		(178,994	)
Stock indices		4,746
Realized trading income/(loss)(1)	$	(754,752	)

(1) Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options.

Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended March 31, 2019

Type of contract
Agriculturals	$	(79,579	)
Currencies		87,240
Energies		221,050
Interest rates		(234,353	)
Metals		484,455
Stock indices		46,739
Change in unrealized trading income/(loss)(1)	$	525,552

Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended March 31, 2018

Type of contract
Metals	$	(589,655	)
Currencies		(270,575	)
Energies		30,389
Agriculturals		42,190
Interest rates		312,483
Stock indices		(288,750	)
Change in unrealized trading income/(loss)(1)	$	(763,918	)

(1) Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit)

Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Trust's open trade equity/(deficit), options written, and receivables from futures commission merchants (each, an "FCM") are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Trust's policy is to recognize amounts subject to master netting arrangements on a net basis on the consolidated statements of financial condition.

The following tables present gross and net information about the Trust's assets and liabilities subject the master netting arrangements as disclosed on the consolidated statements of financial condition as of March 31, 2019 and December 31, 2018:

As of March 31, 2019

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Open Trade Equity/(Deficit)	$	427,769	$	(291,793	)	$	135,976
Swap Contracts		19,800,401		-			19,800,401

As of December 31, 2018

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Open Trade Equity/(Deficit)	$	3,244,057	$	(3,642,246	)	$	(398,189	)
Swap Contracts		20,149,868		-			20,149,868

The Series of the Frontier Funds [Member]

Derivative Instruments and Hedging Activities

8. Derivative Instruments and Hedging Activities

The Series' primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Series do not enter into or hold positions for hedging purposes as defined under ASC 815, Derivatives and Hedging ("ASC 815"). The detail of the fair value of the Series' derivatives by instrument types as of March 31, 2019 and December 31, 2018 is included in the Condensed Schedules of Investments. See Note 4 for further disclosure related to each Series' position in swap contracts. There are embedded management fees in transacting these swaps ranging from 1% to 1.5% based on fair value of swaps and the embedded incentive fees ranging from 15% to 25% based on net new trading profits on swaps.

The following tables summarize the monthly averages of forwards, options and futures contracts bought and sold for each respective Series of the Trust:

For the Three Months ended March 31, 2019

Monthly average contracts:

	Bought		Sold
Frontier Balanced Fund		251		306

For the Three Months ended March 31, 2018

Monthly average contracts:

	Bought		Sold
Frontier Balanced Fund		1,348		1,217

The following tables summarize the trading revenues for the three months ended March 31, 2019 and 2018 by sector:

Realized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2019

Type of contract	Frontier Balanced Fund
Agriculturals	$	(45,090	)
Currencies		(118,064	)
Energies		(29,682	)
Interest rates		235,633
Metals		(4,975	)
Stock indices		(33,296	)
Realized trading income/(loss)(1)	$	4,526

Realized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2018

Type of contract	Frontier Balanced Fund
Metals	$	(59,526	)
Currencies		17,651
Energies		48,325
Agriculturals		28,070
Interest rates		(86,844	)
Stock indices		26,652
Realized trading income/(loss)(1)	$	(25,672	)

(1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options.

Unrealized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2019

Type of contract	Frontier Balanced Fund
Agriculturals	$	(24,291	)
Currencies		(73,863	)
Energies		8,770
Interest rates		(7,691	)
Metals		2,411
Stock indices		(7,572	)
Change in unrealized trading income/(loss)(1)	$	(102,236	)

Unrealized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2018

Type of contract	Frontier Balanced Fund
Metals	$	13,694
Currencies		(41,931	)
Energies		(44,022	)
Agriculturals		41,234
Interest rates		148,669
Stock indices		(7,379	)
Change in unrealized trading income/(loss)(1)	$	110,265

(1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).

Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Series' open trade equity/(deficit), options written, and receivables from futures commission merchants (each, an "FCM") are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Series' policy is to recognize amounts subject to master netting arrangements on a net basis on the statements of financial condition.

The following tables present gross and net information about the Series' assets and liabilities subject to master netting arrangements as disclosed on the statements of financial condition as of March 31, 2019 and December 31, 2018.

As of March 31, 2019

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Frontier Balanced Fund
Open Trade Equity/(Deficit)	$	307,042	$	(163,216	)	$	143,826
Swap Contracts		10,599,721		-		$	10,599,721
Frontier Diversified Fund
Swap Contracts	$	5,833,765	$	-		$	5,833,765
Frontier Long/Short Commodity Fund
Swap Contracts	$	461,666	$	-		$	461,666
Frontier Heritage Fund
Swap Contracts	$	2,905,249	$	-		$	2,905,249

As of December 31, 2018

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Frontier Balanced Fund
Open Trade Equity/(Deficit)	$	348,879	$	(128,220	)	$	220,659
Swap Contracts		10,794,908		-		$	10,794,908
Frontier Diversified Fund
Swap Contracts	$	5,920,414	$	-		$	5,920,414
Frontier Long/Short Commodity Fund
Swap Contracts	$	479,102	$	-		$	479,102
Frontier Heritage Fund
Swap Contracts	$	2,955,444	$	-		$	2,955,444

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Trading Activities and Related Risks

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Trading Activities and Related Risks

9. Trading Activities and Related Risks

The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act, as amended (the “Commodity Exchange Act”), requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited.

The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company and Galaxy Plus entity expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty.

In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus, there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company.

The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.

The Series of the Frontier Funds [Member]

Trading Activities and Related Risks

9. Trading Activities and Related Risks

The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited.

The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty.

In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company.

The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.

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Indemnifications and Guarantees

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Indemnifications and Guarantees/Indemnifications and Guarantees noted in Management Discussion and Analysis

10. Indemnifications and Guarantees

The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Trust up to the amount of equity at risk with the custodians of the Trust. The Trust has not recorded any liability for the guarantees in the accompanying financial statements as it expects any possibility of losses to be remote. The Trust has not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.

The Series of the Frontier Funds [Member]

Indemnifications and Guarantees/Indemnifications and Guarantees noted in Management Discussion and Analysis

10. Indemnifications and Guarantees noted in Management Discussion and Analysis

The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Series up to the amount of equity at risk with the custodian of the referenced Series as allocated from the Trading Company. The Series have not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.

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Subsequent Events

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Subsequent Events

11. Subsequent Events

The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements.

From April 1, 2019 through June 24, 2019, the Trust paid $8,744,982 in redemptions.

The Series of the Frontier Funds [Member]

Subsequent Events

11. Subsequent Events

The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements.

From April 1, 2019 through June 24, 2019, Frontier Balanced Fund, Frontier Diversified Fund, Frontier Heritage Fund, Frontier Long/Short Commodity Fund, Frontier Masters Fund, Frontier Select Fund, and Frontier Global Fund paid $3,330,926, $1,038,567, $710,961, $127,007, $1,520,995 $249,842 and $1,766,684, respectively, in redemptions.

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Basis of Presentation

Basis of Presentation—The Trust follows GAAP, as established by the Financial Accounting Standards Board (the “FASB”), to ensure consistent reporting of financial condition, condensed schedules of investments, results of operations, changes in capital and cash flows. The Trust is an investment company following accounting and reporting guidance in Accounting Standards Codification (“ASC”) 946.

Consolidation

Consolidation—The Series, through investing in the Trading Companies and Galaxy Plus, authorize certain Trading Advisors to place trades and manage assets at pre-determined investment levels. The Trading Companies were organized by the Managing Owner for the purpose of investing in commodities interests and derivative instruments, and have no operating income or expenses, except for trading income and expenses and a risk analysis fee (for closed Series only), all of which is allocated to the Series, if consolidated by a Series. Galaxy Plus is a series of Delaware limited liability companies, sponsored by Gemini Alternative Funds, LLC, that create exposure to a variety of third party professional managed futures and foreign exchange advisors. Galaxy Plus is available to qualified high-net-worth individuals and institutional investors. Investment interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Trust’s interest in the NAV in the Galaxy Plus entities. The equity interest held by Trust is shown as investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion to of the investment level of the private investment companies is shown in the statements of operations as net unrealized gain/(loss) on private investment companies. The Trading Companies and Series of the Trust are consolidated by the Trust. All intercompany transactions have been eliminated in consolidation.

Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.

Use of Estimates

Use of Estimates—The preparation of consolidated financial statements in conformity with GAAP may require the Managing Owner to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The valuation of swap contracts requires significant estimates as well as the valuation of certain other investments. Please refer to Note 3 for discussion of valuation methodology. Actual results could differ from these estimates and such differences could be material.

Cash and Cash Equivalents

Cash and Cash Equivalents—Cash and cash equivalents include cash and overnight investments in interest-bearing demand deposits held at banks with original maturities of three months or less. This cash is not restricted.

Interest Income

Interest Income—U.S. Treasury Securities are pooled for purposes of maximizing returns on these assets to investors of all Series. Interest income from pooled cash management assets is recognized on the accrual basis and allocated daily to each Series based upon its daily proportion of ownership of the pool. Aggregate interest income from all sources, including U.S. Treasuries and assets held at a futures commission merchant (“FCM”), of up to two percentage points of the aggregate percentage yield (annualized) of net asset value less any fair market value related to swaps, is paid to the Managing Owner by the Frontier Balanced Fund (Class 1, and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. All interest not paid to the Managing Owner is interest income to the Series, and shown net on the statement of operations.

U.S. Treasury Securities

U.S. Treasury Securities—U.S. Treasury Securities are reported at fair value as Level 1 inputs under ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). The Trust values U.S. Treasury Securities at fair value and records the daily change in value in the consolidated statements of operations as net unrealized gain/(loss) on U.S. Treasury securities. Accrued interest is reported on the consolidated statements of financial condition as interest receivable.

Receivable from Futures Commission Merchants

Receivable from Futures Commission Merchants—The Trust deposits assets with a FCM subject to CFTC regulations and various exchange and broker requirements. Margin requirements are satisfied by the deposit of cash with such FCM. The Trust earns interest income on its assets deposited with the FCM. A portion of the receivable is restricted cash required to meet maintenance margin requirements. Cash with the clearing broker as of December 31, 2018 and March 31, 2019 included restricted cash for margin requirements of $1,717,065 and $1,236,259 for the Frontier Trading Company I LLC, and $4,621,100 and $7,839 for Frontier Trading Company II LLC, respectively.

Investment Transactions

Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the consolidated statements of financial condition as a net unrealized gain or loss, as there exists a right of offset of unrealized gains or losses in accordance with FASB ASC 210, Balance Sheet (“ASC 210”) and Accounting Standards Update (ASU) 2013-01, Balance Sheet (Topic 210).

Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations.

Purchase and Sales of Private Investment Companies

Purchase and Sales of Private Investment Companies—The Trust is able to subscribe into and redeem from the Galaxy Plus entities on a weekly basis. The value of the private investment companies is determined by the Sponsor and reported on a daily basis. The change in value is calculated as the difference between the total purchase proceeds and the fair value calculated by the Sponsor and is recorded as net unrealized gain/(loss) on private investment companies on the statements of operations.

Foreign Currency Transactions

Foreign Currency Transactions—The Series of the Trust’s functional currency is the U.S. dollar; however, they transact business in currencies other than the U.S. dollar. The Series of the Trust do not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from fluctuations arising from changes in market prices of securities held. Such fluctuations are included with the net realized or unrealized gain or loss from investments.

Allocation of Earnings

Allocation of Earnings—Each Series of the Trust may maintain three to seven classes of Units—Class 1, Class 2, Class 3, Class 1a, Class 2a Class 3a and Class 1AP. All classes have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that fees charged to a Class or Series differ as described below. Revenues, expenses (other than expenses attributable to a specific class), and realized and unrealized trading gains and losses of each Series are allocated daily to Class 1, Class 1a, Class 2, Class 2a, Class 3, Class 3a and Class 1AP Units based on each Class’ respective owners’ capital balances as applicable to the classes maintained by the Series.

Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.

Investments and Swaps

Investments and Swaps—The Trust records investment transactions on a trade date basis and all investments are recorded at fair value, with changes in fair value reported as a component of realized and unrealized gains/(losses) on investments in the statements of operations. Investments in private investment companies are valued utilizing the net asset values as a practical expedient. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the discretion of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more underlying investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. The valuation of swap contracts requires significant estimates. Swap contracts are reported at fair value based upon daily reports from the counterparty. The Managing Owner reviews and approves current day pricing of the CTA positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, that is used to determine a daily fair value NAV for the swap contracts.

Income Taxes

Income Taxes—The Trust applies the provisions of ASC 740 Income Taxes (“ASC 740”), which provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements. This interpretation also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods and disclosure. ASC 740 requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Trust’s financial statements to determine whether the tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax positions with respect to tax at the Trust’s level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The Managing Owner has concluded there is no tax expense, interest or penalties to be recorded by the Trust for the quarter ended March 31, 2019. The 2015 through 2018 tax years generally remain subject to examination by U.S. federal and most state tax authorities.

In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust.

Fees and Expenses

Fees and Expenses—All management fees, incentive fees, service fees, risk analysis fees (for closed Series only) and trading fees of the Trust are paid to the Managing Owner. It is the responsibility of the Managing Owner to pay all Trading Advisor management and incentive fees, selling agent service fees and all other operating expenses and continuing offering costs of the Trust. Only management fees and incentive fees related to assets allocated through Trading Companies are included in expense on the Consolidated Statement of Operations. The Series are all charged management and incentive fees on the asset allocated through the Galaxy Plus entities. Those fees are included in unrealized gain/(loss) on private investment companies on the Consolidated Statements of Operations. The Series are also charged management and incentive fees on assets allocated to swaps. Such fees are embedded in the fair value of the swap and are included in net unrealized gain (loss) on swap contracts on the Consolidated Statements of Operations.

Incentive Fee (rebate)

Incentive Fee (rebate)—The Managing Owner is allowed to share in the incentive fees earned by the Commodity Trading Advisors up to 10% of New Net Profits (as defined in the prospectus). If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period, then the Managing Owner is obligated to return any amount in excess. The returned amounts are recorded as Incentive Fee (Rebate) on the Consolidated Statements of Operations.

Service Fees

Service Fees—The Trust may maintain each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such Selling agents.

Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $497,326 and $548,696 as of December 31, 2018 and March 31, 2019, respectively.

These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.

Pending Owner Additions

Pending Owner Additions—Funds received for new subscriptions and for additions to existing owner interests are recorded as capital additions at the NAV per unit of the second business day following receipt.

Owner redemptions payable

Owner redemptions payable—Funds payable for existing owner redemption requests are recorded as capital subtractions at the NAV per unit on the second business day following receipt or request.

Recently Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements—In August 2018, FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies that are required to include fair value measurement disclosures. In general, the amendments in ASU 2018-13 are effective for all entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. An entity is permitted to early adopt the removed or modified disclosures upon the issuance of ASU 2018-13 and may delay adoption of the additional disclosures, which are required for public companies only, until their effective date. Management is currently evaluating the impacts ASU 2018-13 will have on the financial statements.

Subsequent Events

Subsequent Events—The Trust follows the provisions of ASC 855, Subsequent Events, which establishes general standards of accounting for and disclosure of events that occur after the balance sheet date and up through the date the financial statements are issued. Refer to Note 11.

The Series of the Frontier Funds [Member]

Basis of Presentation

Basis of Presentation—The Series of the Trust follow U.S. Generally Accepted Accounting Principles (“GAAP”), as established by the Financial Accounting Standards Board (the “FASB”), to ensure consistent reporting of financial condition, condensed schedules of investments, results of operations, changes in capital and cash flows. The Trust is an investment company following accounting and reporting guidance in Accounting Standards Codification (“ASC”) 946.

Consolidation

Consolidation— The Series, through investing in the Trading Companies and Galaxy Plus entities, authorize certain Trading Advisors to place trades and manage assets at pre-determined investment levels. The Trading Companies were organized by the Managing Owner for the purpose of investing in commodities interests and derivative instruments, and have no operating income or expenses, except for trading income and expenses and a risk analysis fee (for closed Series only), all of which is allocated to the Series if consolidated by a Series. Galaxy Plus is a series of Delaware limited liability companies, sponsored by Gemini Alternative Funds, LLC, that create exposure to a variety of third party professional managed futures and foreign exchange advisors. Galaxy Plus is available to qualified high-net-worth individuals and institutional investors. Trading Companies in which a Series has a controlling and majority interest as calculated on that Series’ pro-rata net asset value in the Trading Company are consolidated by such Series.

Investments in Trading Companies in which a Series does not have a controlling and majority interest and all interests in Galaxy Plus entities are accounted for using net asset value as the practical expedient, which approximates fair value. Fair value represents the proportionate share of the Series’ interest in the NAV in a Trading Company or Galaxy Plus entity. The equity interest held by Series of the Trust is shown as investments in unconsolidated Trading Companies or investments in private investment companies in the statements of financial condition. The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies.

Galaxy Plus entities are co-mingled investment vehicles.  In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers.  As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.

Use of Estimates

Use of Estimates—The preparation of financial statements in conformity with GAAP may require the Managing Owner to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The valuation of swap contracts requires significant estimates as well as the valuation of certain other investments. Please refer to Note 3 for discussion of valuation methodology. Actual results could differ from these estimates, and such differences could be material.

Cash and Cash Equivalents

Cash and Cash Equivalents—Cash and cash equivalents include cash and overnight investments in interest-bearing demand deposits held at banks with original maturities of three months or less. This cash is not restricted.

Interest Income

Interest Income— U.S. Treasury Securities are pooled for purposes of maximizing returns on these assets to investors of all Series. Interest income from pooled cash management assets is recognized on the accrual basis and allocated daily to each Series based upon its daily proportion of ownership of the pool. Aggregate interest income from all sources, including U.S. Treasuries and assets held at a futures commission merchant (“FCM”), of up to two percentage points of the aggregate percentage yield (annualized) of net asset value less any fair market value related to swaps, is paid to the Managing Owner by the Frontier Balanced Fund (Class 1, and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. All interest not paid to the Managing Owner is interest income to the Series and shown net on the statement of operations. The amount reflected in the financial statements of the Series are disclosed on a net basis. Due to some classes not exceeding the 2% paid to the Managing Owner, amounts earned by those Series may be zero.

U.S. Treasury Securities

U.S. Treasury Securities—U.S. Treasury Securities are allocated to all Series of the Trust based on each Series’ percentage ownership in the pooled cash management assets as of the reporting date. They are reported at fair value as Level 1 inputs under ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). The Series of the Trust valued U.S. Treasury Securities at fair value and recorded the daily change in value in the statements of operations as net unrealized gain/(loss) on U.S. Treasury securities. Accrued interest is reported on the statements of financial condition as interest receivable.

Receivable from Futures Commission Merchants

Receivable From Futures Commission Merchants—The Series of the Trust deposit assets with a FCM subject to CFTC regulations and various exchange and broker requirements. Margin requirements are satisfied by the deposit of cash with such FCM. The Trust, with respect to the Series, earns interest income on its assets deposited with the FCM. A portion of the receivable is restricted cash required to meet maintenance margin requirements. Cash with the clearing broker as of March 31, 2019 and December 31, 2018 included restricted cash for margin requirements of $1,236,259 and $1,717,065, respectively, for the Frontier Balanced Fund.

Investment Transactions

Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the statements of financial condition as open trade equity (deficit) for futures and forwards as there exists a right of offset of unrealized gains or losses in accordance with ASC 210, Balance Sheet (“ASC 210”) and Accounting Standards Update (ASU) 2013-01, Balance Sheet (Topic 210).

Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations.

Purchase and Sales of Private Investment Companies

Purchase and Sales of Private Investment Companies – The Series are able to subscribe into and redeem from the Galaxy Plus entities on a weekly basis. The value of the private investment companies is determined by the Sponsor and reported on a daily basis. The change in value is calculated as the difference between the total purchase proceeds and the fair value calculated by the Sponsor and is recorded as net unrealized gain/(loss) on private investment companies on the statements of operations.

Foreign Currency Transactions

Foreign Currency Transactions—The Series’ functional currency is the U.S. dollar; however, they transact business in currencies other than the U.S. dollar. The Series do not isolate that portion of the results of operations resulting from changes in foreign exchange rates on investments from fluctuations arising from changes in market prices of securities held. Such fluctuations are included with the net realized or unrealized gain or loss from investments.

Allocation of Earnings

Allocation of Earnings—Each Series of the Trust may maintain three to seven subclasses of Units—Class 1, Class 2, Class 3, Class 1a, Class 2a, Class 3a, and Class 1AP. All classes have identical voting, dividend, liquidation and other rights and the same terms and conditions, except that fees charged to a Class or Series differ as described below. Revenues, expenses (other than expenses attributable to a specific class), and realized and unrealized trading gains and losses of each Series are allocated daily to Class 1, Class 2, Class 3, Class 1a, Class 2a, Class 3a, and Class 1AP Units based on each Class’ respective owners’ capital balances as applicable to the classes maintained by the Series.

Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.

Investments and Swaps

Investments and Swaps—The Trust, with respect to the Series, records investment transactions on a trade date basis and at fair value, with changes in fair value reported as a component of realized and unrealized gains/(losses) on investments in the statements of operations. Investments in private investment companies are valued utilizing the net asset values as a practical expedient. Certain Series of the Trust strategically invest a portion or all of their assets in total return swaps, selected at the discretion of the Managing Owner. Swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more underlying investment products or indices. In a typical swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount of value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. The valuation of swap contracts requires significant estimates. Swap contracts are reported at fair value based upon daily reports from the counterparty. The Managing Owner reviews and approves current day pricing of the commodity trading advisor (“CTA”) positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, that is used to determine a daily fair value NAV for the swap contracts. 

Income Taxes

Income Taxes—The Trust, with respect to the Series, applies the provisions of ASC 740 Income Taxes (“ASC 740”), which provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements. This interpretation also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods and disclosure. ASC 740 requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Trust, with respect to the Series’, financial statements to determine whether the tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax positions with respect to tax at the Trust’s level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The Managing Owner has concluded there is no tax expense, interest or penalties to be recorded by the Trust, with respect to the Series. The 2015 through 2018 tax years generally remain subject to examination by U.S. federal and most state tax authorities.

In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust.

Fees and Expenses

Fees and Expenses—All management fees, incentive fees, service fees, risk analysis fees (for closed Series only) and trading fees of the Trust, with respect to the Series, are paid to the Managing Owner. It is the responsibility of the Managing Owner to pay all Trading Advisor management and incentive fees, selling agent service fees and all other operating expenses and continuing offering costs of the Trust, with respect to the Series. Only management fees and incentive fees related to assets allocated through Trading Companies are included in expense on the Statement of Operations. The Series are all charged management and incentive fees on the asset allocated through the Galaxy Plus entities. Those fees are included in unrealized gain/(loss) on private investment companies on the Statements of Operations. The Series are also charged management and incentive fees on assets allocated to swaps.  Such fees are embedded in the fair value of the swap and are included in net unrealized gain (loss) on swap contracts on the Statements of Operations.

Incentive Fee (rebate)

Incentive Fee (rebate)—The Managing Owner is allowed to share in the incentive fees earned by the CTAs up to 10% of New Net Profits (as defined in the prospectus). If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period for a particular series, then the Managing Owner is obligated to return any amount in excess to the Series. The returned amounts are recorded as Incentive Fee (Rebate) on the Statements of Operations.

Service Fees

Service Fees—The Trust may maintain each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.

Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2017 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2019 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $26,419, $31,999, $143, $283,754, $12,874, $142,468 and $51,039 for the Frontier Diversified, Masters,  Long/Short Commodity, Balanced, Select, Global and Heritage Funds, respectively, as of March 31, 2019 and $20,430, $28,100, none, $258,194, $11,162, $133,281 and $46,159 respectively, as of December 31, 2018.

These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.

Pending Owner Additions

Pending Owner Additions—Funds received for new subscriptions and for additions to existing owner interests are recorded as capital additions at the NAV per unit of the second business day following receipt.

Owner redemptions payable

Owner redemptions payable—Funds payable for existing owner redemption requests are recorded as capital subtractions at the NAV per unit on the second business day following receipt or request.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements— In August 2018, FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies that are required to include fair value measurement disclosures. In general, the amendments in ASU 2018-13 are effective for all entities for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. An entity is permitted to early adopt the removed or modified disclosures upon the issuance of ASU 2018-13 and may delay adoption of the additional disclosures, which are required for public companies only, until their effective date. Management is currently evaluating the impacts ASU 2018-13 will have on the financial statements.

Subsequent Events

Subsequent Events—The Series follow the provisions of ASC 855, Subsequent Events, which establishes general standards of accounting for and disclosure of events that occur after the balance sheet date and up through the date the financial statements are issued. Refer to Note 11.

XML

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Schedule of financial asset portfolio measured at fair value

March 31, 2019	Level 1 Inputs		Level 2 Inputs			Level 3 Inputs		Fair Value
Open Trade Equity (Deficit)	$	206,634	$	(70,658	)	$	-	$	135,976
Swap Contracts		-		-			19,800,401		19,800,401
U.S. Treasury Securities		2,807,036		-			-		2,807,036

December 31, 2018	Level 1 Inputs			Level 2 Inputs		Level 3 Inputs		Fair Value
Open Trade Equity (Deficit)	$	(400,796	)	$	2,607	$	-	$	(398,189	)
Swap Contracts		-			-		20,149,868		20,149,868
U.S. Treasury Securities		5,684,327			-		-		5,684,327

Schedule of change in Level 3 assets measured at fair value on recurring basis

	For the Three Months ended March 31, 2019
Balance of recurring Level 3 assets as of January 1, 2018		20,149,868
Total gains or losses (realized/unrealized):
Included in earnings-realized		-
Included in earnings-unrealized		(349,467	)
Proceeds from collateral reduction		-
Purchase of investments		-
Sale of investments		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of March 31, 2019		19,800,401

	For the Year ended December 31, 2018
Balance of recurring Level 3 assets as of January 1, 2018		21,208,838
Total gains or losses (realized/unrealized):
Included in earnings-realized		-
Included in earnings-unrealized		2,041,028
Proceeds from collateral reduction		(3,099,998	)
Purchase of investments		-
Sale of investments		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of December 31, 2018		20,149,868

Schedule of change in unrealized appreciation (depreciation)

Swaps	$	(349,467	)
Swaps	$	2,041,028

The Series of the Frontier Funds [Member]

Schedule of financial asset portfolio measured at fair value

	Level 1		Level 2			Level 3		Total
March 31, 2019	Inputs		Inputs			Inputs		Fair Value
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	$	19,736	$	-		$	-	$	19,736
Swap Contracts		-		-			5,833,765		5,833,765
Frontier Masters Fund
Investment in Unconsolidated Trading Companies		15,106		-			-		15,106
U.S. Treasury Securities		31,044		-			-		31,044
Frontier Long/Short Commodity Fund
Investment in Unconsolidated Trading Companies		23,927		-			-		23,927
Swap Contracts		-		-			461,666		461,666
U.S. Treasury Securities		184,850		-			-		184,850
Frontier Balanced Fund
Investment in Unconsolidated Trading Companies		73,545		-			-		73,545
Open Trade Equity (Deficit)		214,486		(70,660	)		-		143,826
Swap Contracts		-		-			10,599,721		10,599,721
U.S. Treasury Securities		288,004		-			-		288,004
Frontier Select Fund
Investment in Unconsolidated Trading Companies		12,767		-			487,382		500,149
U.S. Treasury Securities		98,635		-			-		98,635
Frontier Global Fund
Investment in Unconsolidated Trading Companies		319,038		-			-		319,038
U.S. Treasury Securities		2,026,585		-			-		2,026,585
Frontier Heritage Fund
Investment in Unconsolidated Trading Companies		31,389		-			-		31,389
Swap Contracts		-		-			2,905,249		2,905,249
U.S. Treasury Securities		177,918		-			-		177,918

	Level 1		Level 2			Level 3		Total
December 31, 2018	Inputs		Inputs			Inputs		Fair Value
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	$	1,157,971	$	2,939		$	-	$	1,160,910
Swap Contracts		-		-			5,920,414		5,920,414
U.S. Treasury Securities		1,553,261		-			-		1,553,261
Frontier Masters Fund
Investment in Unconsolidated Trading Companies		772,732		2,356			-		775,088
U.S. Treasury Securities		152,384		-			-		152,384
Frontier Long/Short Commodity Fund
Investment in Unconsolidated Trading Companies		28,163		-			-		28,163
Swap Contracts		-		-			479,102		479,102
U.S. Treasury Securities		202,415		-			-		202,415
Frontier Balanced Fund
Investment in Unconsolidated Trading Companies		1,739,609		5,390			-		1,744,999
Open Trade Equity (Deficit)		242,860		(22,201	)		-		220,659
Swap Contracts		-		-			10,794,908		10,794,908
U.S. Treasury Securities		123,409		-			-		123,409
Frontier Select Fund
Investment in Unconsolidated Trading Companies		11,462		-			511,718		523,180
U.S. Treasury Securities		82,386		-			-		82,386
Frontier Winton Fund
Investment in Unconsolidated Trading Companies		4,280,023		12,052			-		4,292,075
U.S. Treasury Securities		3,126,551		-			-		3,126,551
Frontier Heritage Fund
Investment in Unconsolidated Trading Companies		724,614		2,072			-		726,686
Swap Contracts		-		-			2,955,444		2,955,444
U.S. Treasury Securities		443,921		-			-		443,921

Schedule of change in Level 3 assets measured at fair value on recurring basis

For the Three Months ending March 31, 2019

Swaps

	Frontier Balanced Fund			Frontier Long/Short Commodity Fund
Balance of recurring Level 3 assets as of  January 1, 2019	$	10,794,908		$	479,102
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		(195,187	)		(17,436	)
Proceeds from collateral reduction		-			-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of March 31, 2019	$	10,599,721		$	461,666

	Frontier Diversified Fund			Frontier Heritage Fund
Balance of recurring Level 3 assets as of  January 1, 2019	$	5,920,414		$	2,955,444
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		(86,649	)		(50,194	)
Proceeds from collateral reduction		-			-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of March 31, 2019	$	5,833,765		$	2,905,249

For the Three Months ending March 31, 2019

Investments in Unconsolidated Trading Companies: 

	Frontier Select Fund
Balance of recurring Level 3 assets as of January 1, 2019	$	511,718
Change in fair value of investments in unconsolidated trading companies		(24,336	)
Purchases of investments of unconsolidated trading companies		-
Change in ownership allocation		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of March 31, 2019	$	487,382

For the Year Ended December 31, 2018

Swaps

	Frontier Balanced Fund			Frontier Long/Short Commodity Fund
Balance of recurring Level 3 assets as of January 1, 2018	$	11,340,959		$	397,039
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		1,453,948			82,063
Proceeds from collateral reduction		(1,999,999	)		-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of December 31, 2018	$	10,794,908		$	479,102

	Frontier Diversified Fund			Frontier Heritage Fund
Balance of recurring Level 3 assets as of January 1, 2018	$	6,376,472		$	3,094,367
Total gains or losses (realized/unrealized):
Included in earnings-realized		-			-
Included in earnings-unrealized		643,941			(138,923	)
Proceeds from collateral reduction		(1,099,999	)		-
Change in ownership allocation		-			-
Transfers in and/or out of Level 3		-			-
Balance of recurring Level 3 assets as of December 31, 2018	$	5,920,414		$	2,955,444

For the Twelve Months Ended December 31, 2018

Investments in Unconsolidated Trading Companies:

	Frontier Select Fund
Balance of recurring Level 3 assets as of  January 1, 2018	$	579,073
Change in fair value of investments in unconsolidated
trading companies		(67,355	)
Purchases of investments of unconsolidated		-
trading companies		-
Change in ownership allocation		-
Transfers in and/or out of Level 3		-
Balance of recurring Level 3 assets as of December 31, 2018	$	511,718

Schedule of change in unrealized appreciation (depreciation)

	Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Balanced Fund			Frontier Heritage Fund
Swap Contracts	$	(86,649	)	$	(17,436	)	$	(195,187	)	$	(50,194	)
	Frontier Select Fund
Investments in Unconsolidated Trading Companies	$	(24,336	)

	Frontier Diversified Fund			Frontier Long/Short Commodity Fund		Frontier Balanced Fund		Frontier Heritage Fund
Swap Contracts	$	643,941		$	82,063	$	1,453,948	$	(138,923	)
	Frontier Select Fund
Investments in Unconsolidated Trading Companies	$	(67,355	)

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Swaps Contracts (Tables)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Schedule of Investments in following swap

	XXXIV Balanced select swap			XXXV Diversified select swap			XXXVII L/S select swap			Brevan Howard
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,513,721		$	5,747,765		$	431,716		$	1,926,299
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	(195,186	)	$	(86,648	)	$	(17,436	)	$	(50,194	)
Fair Value as of December 31, 2018	$	10,599,721		$	5,833,765		$	461,666		$	2,905,249
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	$	(115,000	)	$	(1,900,000	)

	XXXIV Balanced select swap			XXXV Diversified select swap			XXXVII L/S select swap			Brevan Howard
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,708,908		$	5,834,414		$	449,152		$	1,976,494
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	1,453,948		$	643,941		$	82,063		$	(138,924	)
Fair Value as of December 31, 2018	$	10,794,908		$	5,920,414		$	479,102		$	2,955,444
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	$	(115,000	)	$	(1,900,000	)

The Series of the Frontier Funds [Member]

Schedule of Investments in following swap

	Frontier Balanced Fund			Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Heritage Fund
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,513,721		$	5,747,765		$	431,716		$	1,926,299
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	(195,186	)	$	(86,648	)	($	17,436	)	$	(50,194	)
Fair Value as of December 31, 2018	$	10,599,721		$	5,833,765		$	461,666		$	2,905,249
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	($	115,000	)	$	(1,900,000	)

	Frontier Balanced Fund			Frontier Diversified Fund			Frontier Long/Short Commodity Fund			Frontier Heritage Fund
	Total Return Swap			Total Return Swap			Total Return Swap			Total Return Swap
Counterparty	DeutscheBank AG			DeutscheBank AG			DeutscheBank AG			DeutscheBank AG
Notional Amount	$	7,420,403		$	1,761,834		$	653,610		$	2,072,056
Termination Date		7/31/2023			7/31/2023			7/31/2023			3/27/2023
Cash Collateral	$	86,000		$	86,000		$	29,950		$	978,950
Swap Value	$	10,708,908		$	5,834,414		$	449,152		$	1,976,494
Investee Returns		Total Returns			Total Returns			Total Returns			Total Returns
Realized Gain/(Loss)	$	0		$	0		$	0		$	0
Change in Unrealized Gain/(Loss)	$	1,453,948		$	643,941		$	82,063		($	138,924	)
Fair Value as of December 31, 2018	$	10,794,908		$	5,920,414		$	479,102		$	2,955,444
Advance on swap appreciation	$	(6,176,555	)	$	(4,000,000	)	($	115,000	)	($	1,900,000	)

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Investments in Private Investment Companies (Tables)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Schedule of equity in earnings from private investment companies

	Three Months Ended March 31, 2019												Three Months Ended March 31, 2018
	Trading Commissions			Realized Gain/(Loss)			Change in Unrealized Gain/(Loss)			Net Income (Loss)			Trading Commissions			Realized Gain/(Loss)			Change in Unrealized Gain/(Loss)			Net Income (Loss)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(110,373	)		613,319			1,452,650			1,955,596			(49,914	)		(71,608	)		(87,591	)		(209,113	)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			(76,396	)		68,413			(7,983	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(18,647	)		59,373			(107,028	)		(66,302	)		(26,783	)		(433,944	)		62,280			(398,447	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(165,783	)		4,669,951			(5,454,164	)		(949,996	)		(242,357	)		1,839,882			(1,824,122	)		(226,597	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(18,698	)		1,225,553			180,282			1,387,137			(29,780	)		(624,013	)		106,684			(547,109	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(55,629	)		(55,629	)		-			-			146,610			146,610
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(48,694	)		(997,030	)		16,340			(1,029,384	)		(57,285	)		(1,369,079	)		(538,899	)		(1,965,263	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(38,565	)		34,869			(22,524	)		(26,220	)		(67,063	)		114,702			(8,659	)		38,980
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(9,226	)		(15,734	)		57,714			32,754			(14,370	)		24,498			(44,246	)		(34,118	)
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC		-			-			(31,483	)		(31,483	)		-			-			(27,611	)		(27,611	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(47,947	)		(122,096	)		13,721			(156,322	)		(75,103	)		(197,579	)		(405,904	)		(678,586	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(108,847	)		(323,299	)		286,321			(145,825	)		(299,641	)		(4,386,243	)		300,352			(4,385,532	)
Total	$	(566,780	)	$	5,144,906		$	(3,663,800	)	$	914,326			(862,296	)	$	(5,179,780	)	$	(2,252,693	)	$	(8,294,769	)

Schedule of private investment companies have certain redemption and liquidity restrictions

	Redemptions Notice Period	Redemptions Permitted	Liquidity Restrictions
Frontier Funds
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund  (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None

The Series of the Frontier Funds [Member]

Investments in Unconsolidated Trading Companies

	As March 31, 2019					As of December 31, 2018
	Percentage					Percentage
	of Series					of Series
	Total Capital Invested in					Total Capital Invested in
Series	Unconsolidated Trading Companies			Fair Value		Unconsolidated Trading Companies			Fair Value
Frontier Diversified Series — Frontier Trading Companies II and XXXVIII		0.14	%	$	19,736		7.19	%	$	1,160,910
Frontier Masters Fund --- Frontier Trading Companies II and XXXVIII		0.30	%	$	15,106		13.91	%	$	775,088
Frontier Long/Short Commodity Fund --- Frontier Trading Company XXXVIII		1.12	%	$	23,927		1.15	%	$	28,163
Frontier Balanced Fund --- Frontier Trading Companies II and XXXVIII		0.27	%	$	73,545		5.48	%	$	1,744,999
Frontier Select Fund --- Frontier Trading Companies XXXVIII and XXXIX		13.63	%	$	500,149		13.56	%	$	523,180
Frontier Global Fund --- Frontier Trading Companies II and XXXVIII		4.27	%	$	319,038		52.30	%	$	4,292,075
Frontier Heritage Fund --- Frontier Trading Companies II and XXXVIII		0.72	%	$	31,389		16.27	%	$	726,686

Schedule of equity in earnings from private investment companies

	Three Months Ended March 31, 2019															Three Months Ended March 31, 2018
	Trading			Realized			Change in Unrealized			Net Income			Trading			Realized			Change in Unrealized			Net Income
	Commissions			Gain/(Loss)			Gain/(Loss)			(Loss)			Commissions			Gain/(Loss)			Gain/(Loss)			(Loss)
Frontier Balanced Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(139,281	)	$	(139,281	)	$	-		$	-		$	(303,227	)	$	(303,227	)
Frontier Trading Company XXXVIII, LLC		-			-			1,011			1,011			-			-			(4,595	)		(4,595	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(14,414	)		134,933			463,481			584,000			(33,442	)		(53,706	)		(65,693	)		(152,841	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(10,613	)		36,954			(66,548	)		(40,207	)		(16,672	)		(289,977	)		39,719			(266,930	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(68,811	)		2,295,369			(2,658,416	)		(431,858	)		(87,246	)		799,734			(791,836	)		(79,348	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(8,968	)		765,891			110,042			866,965			(20,107	)		(471,750	)		73,955			(417,902	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(18,750	)		(18,750	)		-			-			35,643			35,643
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(28,901	)		(608,323	)		5,649			(631,575	)		(35,900	)		(900,196	)		(363,122	)		(1,299,218	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(25,311	)		24,230			(15,747	)		(16,828	)		(41,561	)		76,468			(5,773	)		29,134
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(4,268	)		(10,217	)		27,339			12,854			(6,723	)		11,076			(22,123	)		(17,770	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(24,512	)		(185,443	)		41,574			(168,381	)		(73,636	)		(1,587,857	)		120,046			(1,541,447	)
Total	$	(185,798	)	$	2,453,394		$	(2,249,646	)	$	17,950		$	(315,287	)	$	(2,416,208	)	$	(1,287,006	)	$	(4,018,501	)
Frontier Global Fund —
Frontier Trading Company II LLC	$	-		$	-		$	(313,867	)	$	(313,867	)	$	-		$	-		$	(992,595	)	$	(992,595	)
Frontier Trading Company XXXVIII, LLC		-			-			(14,396	)		(14,396	)		-			-			(37,082	)		(37,082	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(54,326	)		265,913			476,520			688,107			-			-			-			-
Total	$	(54,326	)	$	265,913		$	148,257		$	359,844		$	-		$	-		$	(1,029,677	)	$	(1,029,677	)
Frontier Frontier Select Fund —
Frontier Trading Company XXXIX, LLC	$	-		$	-		$	(24,336	)	$	(24,336	)	$	-		$	-		$	-		$	-
Frontier Trading Company XXXVIII, LLC		-			-			(1,137	)		(1,137	)		-			-			5,578			5,578
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(15,472	)		32,894			83,870			101,292			(50,983	)		(548,310	)		30,050			(569,243	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(24,314	)		(53,259	)		8,099			(69,474	)		(37,496	)		(82,277	)		(191,609	)		(311,382	)
Total	$	(39,786	)	$	(20,365	)	$	66,496		$	6,345		$	(88,479	)	$	(630,587	)	$	(155,981	)	$	(875,047	)
Frontier Heritage Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(54,170	)	$	(54,170	)	$	-		$	-		$	(122,535	)	$	(122,535	)
Frontier Trading Company XXXVIII, LLC		-			-			(2,782	)		(2,782	)		-			-			(967	)		(967	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(17,028	)		62,603			154,712			200,287			-			-			-			-
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(28,077	)		(57,672	)		19,541			(66,208	)		(52,775	)		(544,577	)		56,882			(540,470	)
Total	$	(45,105	)	$	4,931		$	117,301		$	77,127		$	(52,775	)	$	(544,577	)	$	(66,620	)	$	(663,972	)
Frontier Long/Short Commodity Fund
Frontier Trading Company XXXVIII, LLC	$	-		$	-		$	(560	)	$	(560	)	$	-		$	-		$	58		$	58
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			-			-			-
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(14,831	)		257,430			(307,997	)		(65,398	)		(29,775	)		170,180			(161,895	)		(21,490	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(29,334	)		(29,334	)		-			-			93,458			93,458
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(12,286	)		(26,402	)		(1,661	)		(40,349	)		(25,584	)		(229,565	)		16,878			(238,271	)
Total	$	(27,117	)	$	231,028		$	(339,552	)	$	(135,641	)	$	(55,359	)	$	(59,385	)	$	(51,501	)	$	(166,245	)
Frontier Diversified Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(75,905	)	$	(75,905	)	$	-		$	-		$	(150,626	)	$	(150,626	)
Frontier Trading Company XXXVIII, LLC		-			-			(8,593	)		(8,593	)		-			-			983			983
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(10,457	)		87,032			227,597			304,172			(16,472	)		(17,902	)		(21,898	)		(56,272	)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC		(8,034	)		22,419			(40,480	)		(26,095	)		(10,111	)		(143,967	)		22,561			(131,517	)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(41,832	)		1,211,166			(1,421,023	)		(251,689	)		(46,698	)		399,867			(395,918	)		(42,749	)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC		(9,730	)		459,662			70,240			520,172			(9,673	)		(152,263	)		32,729			(129,207	)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC		-			-			(7,545	)		(7,545	)		-			-			17,509			17,509
Galaxy Plus Fund - QIM Feeder Fund (526) LLC		(19,793	)		(388,707	)		10,691			(397,809	)		(21,385	)		(468,883	)		(175,777	)		(666,045	)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC		(13,254	)		10,639			(6,777	)		(9,392	)		(25,502	)		38,234			(2,886	)		9,846
Galaxy Plus Fund - Quest Feeder Fund (517) LLC		(4,958	)		(5,517	)		30,375			19,900			(7,647	)		11,076			(22,123	)		(18,694	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(17,724	)		(81,241	)		57,554			(41,411	)		(40,732	)		(776,278	)		46,407			(770,603	)
Total	$	(125,782	)	$	1,315,453		$	(1,163,866	)	$	25,805		$	(178,220	)	$	(1,110,116	)	$	(649,039	)	$	(1,937,375	)
Frontier Masters Fund —
Frontier Trading Company II, LLC	$	-		$	-		$	(61,450	)	$	(61,450	)	$	-		$	-		$	(241,769	)	$	(241,769	)
Frontier Trading Company XXXVIII, LLC		-			-			223			223			-			-			8,414			8,414
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC		-			-			-			-			-			(76,396	)		68,413			(7,983	)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC		(14,148	)		62,838			130,340			179,030			-			-			-			-
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC		(40,309	)		905,986			(1,066,728	)		(201,051	)		(78,638	)		470,101			(474,473	)		(83,010	)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC		(10,776	)		(5,435	)		85,443			69,232			(55,931	)		(699,656	)		30,089			(725,498	)
Galaxy Plus Fund - TT Feeder Fund (531) LLC		(23,633	)		(68,837	)		5,622			(86,848	)		(37,607	)		(115,302	)		(214,295	)		(367,204	)
Total	$	(88,866	)	$	894,552		$	(906,550	)	$	(100,864	)	$	(172,176	)	$	(421,253	)	$	(823,621	)	$	(1,417,050	)

Schedule of private investment companies have certain redemption and liquidity restrictions

	Redemptions	Redemptions	Liquidity
	Notice Period	Permitted	Restrictions
Frontier Diversified Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None
Frontier Masters Fund
Trend Following
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Long/Short Commodity Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Balanced Fund
Multi-Strategy
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC	24 hours	Daily	None
Galaxy Plus Fund - LRR Feeder Fund (522) LLC	24 hours	Daily	None
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC	24 hours	Daily	None
Galaxy Plus Fund - QIM Feeder Fund (526) LLC	24 hours	Daily	None
Galaxy Plus Fund - Quest Feeder Fund (517) LLC	24 hours	Daily	None
Option Trading
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC	24 hours	Daily	None
Frontier Select Fund
Trend Following
Galaxy Plus Fund - TT Feeder Fund (531) LLC	24 hours	Weekly	None
Multi-Strategy
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Heritage Fund
Multi-Strategy
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC	24 hours	Daily	None
Frontier Global Fund
Trend Following
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC	24 hours	Daily	None

XML

Transactions with Affiliates (Tables) - The Series of the Frontier Funds [Member]

3 Months Ended

Mar. 31, 2019

Schedule of fees earned by managing owner

Three Months Ended March 31, 2019	Incentive (Rebate) Fees		Management Fee		Service Fee		Trading Fee
Frontier Diversified Fund	$	-	$	2,668	$	12,029	$	130,304
Frontier Masters Fund		-		5,593		7,486		67,318
Frontier Long/Short Commodity Fund		-		-		162		13,852
Frontier Balanced Fund		-		8,079		170,865		279,337
Frontier Select Fund		-		-		25,505		22,632
Frontier Global Fund		-		29,148		52,123		42,715
Frontier Heritage Fund		-		6,189		23,185		27,093

Three Months Ended March 31, 2018	Incentive (Rebate) Fees		Management  Fee		Service Fee		Trading Fee
Frontier Diversified Fund	$	1,881	$	11,563	$	16,115	$	165,150
Frontier Masters Fund		-		32,349		14,969		134,048
Frontier Long/Short Commodity Fund		-		-		657		24,693
Frontier Balanced Fund		145,134		20,336		262,981		384,176
Frontier Select Fund		-		-		39,689		37,594
Frontier Global Fund		-		130,660		94,260		82,258
Frontier Heritage Fund		1,394		35,981		37,108		42,292

Schedule of fees payable to managing owner

As of March 31, 2019
	Incentive Fees		Management Fees		Interest Fees		Service Fees		Trading Fees
Frontier Diversified Fund	$	-	$	-	$	-	$	2,490	$	42,268
Frontier Masters Fund		-		-		-		1,287		23,323
Frontier Long/Short Commodity Fund		-		-		-		7		4,103
Frontier Balanced Fund		-		8,966		1,237		47,153		88,587
Frontier Select Fund		-		-		37		7,907		7,483
Frontier Global Fund		-		-		5,504		13,888		19,141
Frontier Heritage Fund		-		-		619		6,058		11,257

As of December 31, 2018
	Incentive Fees		Management Fees		Interest Fees		Service Fees		Trading Fees
Frontier Diversified Fund	$	10,897	$	3,875	$	-	$	4,498	$	44,827
Frontier Masters Fund		-		8,347		-		1,750		27,984
Frontier Long/Short Commodity Fund		-		-		-		51		5,306
Frontier Balanced Fund		-		13,917		1,490		56,791		101,770
Frontier Select Fund		-		-		-		8,575		7,812
Frontier Global Fund		-		42,705		8,124		17,803		24,353
Frontier Heritage Fund		-		9,201		1,238		6,684		10,189

Schedule of interest paid by each series to managing owner

	March 31, 2019		March 31, 2018		March 31, 2019			March 31, 2018
	Gross Amount Paid to the		Gross Amount Paid to the		Ratio to Average			Ratio to Average
	Managing Owner		Managing Owner		Net Assets			Net Assets
Frontier Diversified Fund Class 1	$	-	$	-		0.00	%		0.00	%
Frontier Diversified Fund Class 2		-		-		0.00	%		0.00	%
Frontier Diversified Fund Class 3		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 1		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 2		-		-		0.00	%		0.00	%
Frontier Masters Fund Class 3		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 2		6		50		0.00	%		0.02	%
Frontier Long/Short Commodity Fund Class 3		127		541		0.01	%		0.02	%
Frontier Long/Short Commodity Fund Class 1a		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 2a		-		-		0.00	%		0.00	%
Frontier Long/Short Commodity Fund Class 3a		-		-		0.00	%		0.00	%
Frontier Balanced Fund Class 1		1,731		11,898		0.01	%		0.03	%
Frontier Balanced Fund Class 1AP		26		192		0.01	%		0.03	%
Frontier Balanced Fund Class 2		323		2,138		0.01	%		0.03	%
Frontier Balanced Fund Class 2a		4		45		0.00	%		0.01	%
Frontier Balanced Fund Class 3a		13		127		0.00	%		0.01	%
Frontier Select Fund Class 1		859		2,460		0.01	%		0.05	%
Frontier Select Fund Class 1AP		-		10		0.00	%		0.04	%
Frontier Select Fund Class 2		30		366		0.01	%		0.05	%
Frontier Global Fund Class 1		18,729		28,689		0.27	%		0.22	%
Frontier Global Fund Class 1AP		84		83		0.27	%		0.22	%
Frontier Global Fund Class 2		1,034		3,777		0.26	%		0.23	%
Frontier Heritage Fund Class 1		2,228		4,383		0.07	%		0.09	%
Frontier Heritage Fund Class 1AP		1		5		0.10	%		0.09	%
Frontier Heritage Fund Class 2		414		636		0.07	%		0.09	%
Total	$	25,609	$	55,400

XML

Financial Highlights (Tables)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Schedule of financial highlights of trust

Three months ended March 31	2019			2018
Ratios to average net assets (1)
Net investment income/(loss) (1)		-5.42	%		-5.99	%
Expenses before incentive fees (3) (4)		5.69	%		6.08	%
Expenses after incentive fees (3) (4)		5.69	%		6.22	%
Total return before incentive fees (2)		-1.61	%		-9.55	%
Total return after incentive fees (2)		-1.61	%		-9.69	%

(1) Annualized with the exception of incentive fees.

(2) Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5.

(4) Does not include management and incentive fees at Galaxy Plus.

The Series of the Frontier Funds [Member]

Schedule of financial highlights of trust

	Frontier Diversified Fund									Frontier Masters Fund									Frontier Long/Short Commodity Fund
	Class 1			Class 2			Class 3			Class 1			Class 2			Class 3			Class 1a			Class 2			Class 2a			Class 3			Class 3a
Per unit operating performance (1)
Net asset value, December 31, 2018	$	102.25		$	120.84		$	112.62		$	91.10		$	107.68		$	100.77		$	56.80		$	98.82		$	66.52		$	103.66		$	69.83
Net operating results:
Interest income		0.03			0.04			0.04			0.01			0.01			0.01			0.02			0.03			0.02			0.03			0.02
Expenses		(1.63	)		(1.05	)		(0.98	)		(1.69	)		(1.46	)		(1.37	)		(0.77	)		(0.59	)		(0.37	)		(0.62	)		(0.39	)
Net gain/(loss) on investments, net of non-controlling interests		0.19			(0.14	)		(0.06	)		(1.23	)		(1.54	)		(1.37	)		(5.90	)		(4.59	)		(7.21	)		(4.82	)		(7.49	)
Net income/(loss)		(1.41	)		(1.15	)		(1.00	)		(2.91	)		(2.99	)		(2.73	)		(6.66	)		(5.15	)		(7.56	)		(5.41	)		(7.87	)
Net asset value, March 31, 2019	$	100.84		$	119.69		$	111.62		$	88.19		$	104.69		$	98.04		$	50.14		$	93.67		$	58.96		$	98.25		$	61.96
Ratios to average net assets
Net investment income/(loss)		-6.58	%		-3.51	%		-3.51	%		-8.08	%		-5.87	%		-5.87	%		-6.28	%		-2.46	%		-2.46	%		-2.46	%		-2.46	%
Expenses before incentive fees (3)(4)		6.71	%		3.64	%		3.64	%		8.14	%		5.93	%		5.93	%		6.41	%		2.60	%		2.60	%		2.60	%		2.60	%
Expenses after incentive fees (3)(4)		6.71	%		3.64	%		3.64	%		8.14	%		5.93	%		5.93	%		6.41	%		2.60	%		2.60	%		2.60	%		2.60	%
Total return before incentive fees (2)		-1.38	%		-0.95	%		-0.89	%		-3.19	%		-2.78	%		-2.71	%		-11.73	%		-5.21	%		-11.37	%		-5.22	%		-11.27	%
Total return after incentive fees (2)		-1.38	%		-0.95	%		-0.89	%		-3.19	%		-2.78	%		-2.71	%		-11.73	%		-5.21	%		-11.37	%		-5.22	%		-11.27	%

	Frontier Balanced Fund															Frontier Select Fund
	Class 1			Class 1AP			Class 2			Class 2a			Class 3a			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2018	$	117.63		$	134.16		$	180.94		$	156.81		$	156.26		$	71.41		$	82.48		$	108.18
Net operating results:
Interest income		0.04			0.05			0.07			0.06			0.06			0.00			0.00			0.00
Expenses		(1.97	)		(1.29	)		(1.74	)		(1.51	)		(1.51	)		(0.92	)		(0.49	)		(0.65	)
Net gain/(loss) on investments, net of non-controlling interests		(0.82	)		(0.91	)		(1.22	)		(1.09	)		(1.03	)		0.27			0.31			0.46
Net income/(loss)		(2.74	)		(2.15	)		(2.90	)		(2.54	)		(2.48	)		(0.65	)		(0.18	)		(0.19	)
Net asset value, March 31, 2019	$	114.89		$	132.01		$	178.04		$	154.27		$	153.78		$	70.76		$	82.30		$	107.99
Ratios to average net assets
Net investment income/(loss)		-6.90	%		-3.90	%		-3.90	%		-3.90	%		-3.90	%		-5.58	%		-2.58	%		-2.58	%
Expenses before incentive fees (3)(4)		7.06	%		4.06	%		4.06	%		4.06	%		4.06	%		5.58	%		2.58	%		2.58	%
Expenses after incentive fees (3)(4)		7.06	%		4.06	%		4.06	%		4.06	%		4.06	%		5.58	%		2.58	%		2.58	%
Total return before incentive fees (2)		-2.33	%		-1.60	%		-1.60	%		-1.62	%		-1.59	%		-0.91	%		-0.22	%		-0.18	%
Total return after incentive fees (2)		-2.33	%		-1.60	%		-1.60	%		-1.62	%		-1.59	%		-0.91	%		-0.22	%		-0.18	%

	Frontier Global Fund									Frontier Heritage Fund
	Class 1			Class 1AP			Class 2			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2018	$	131.57		$	149.92		$	187.17		$	99.83		$	111.78		$	152.53
Net operating results:
Interest income		0.00			0.00			0.00			0.00			0.00			0.00
Expenses		(2.19	)		(1.42	)		(1.77	)		(1.54	)		(0.97	)		(1.30	)
Net gain/(loss) on investments, net of non-controlling interests		6.95			8.00			10.08			1.39			1.63			2.23
Net income/(loss)		4.76			6.58			8.31			(0.15	)		0.66			0.93
Net asset value, March 31, 2019	$	136.33		$	156.50		$	195.48		$	99.68		$	112.44		$	153.46
Ratios to average net assets
Net investment income/(loss)		-6.91	%		-3.91	%		-3.91	%		-6.63	%		-3.63	%		-3.63	%
Expenses before incentive fees (3)(4)		6.91	%		3.91	%		3.91	%		6.63	%		3.63	%		3.63	%
Expenses after incentive fees (3)(4)		6.91	%		3.91	%		3.91	%		6.63	%		3.63	%		3.63	%
Total return before incentive fees (2)		3.62	%		4.39	%		4.44	%		-0.15	%		0.59	%		0.61	%
Total return after incentive fees (2)		3.62	%		4.39	%		4.44	%		-0.15	%		0.59	%		0.61	%

(1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.

(2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.

(4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.

	Frontier Diversified Fund									Frontier Masters Fund									Frontier Long/Short Commodity Fund
	Class 1			Class 2			Class 3			Class 1			Class 2			Class 3			Class 1a			Class 2			Class 2a			Class 3			Class 3a
Per unit operating performance (1)
Net asset value, December 31, 2017	$	116.41		$	135.19		$	125.68		$	114.74		$	133.27		$	124.40		$	81.35		$	115.81		$	93.59		$	121.50		$	97.99
Net operating results:
Interest income		0.04			0.05			0.05			0.09			0.10			0.09			0.08			0.11			0.09			0.12			0.10
Expenses		(1.82	)		(1.16	)		(1.08	)		(2.29	)		(1.98	)		(1.85	)		(1.20	)		(0.69	)		(0.56	)		(0.72	)		(0.59	)
Net gain/(loss) on investments, net of non-controlling interests		(8.10	)		(9.82	)		(9.06	)		(14.24	)		(16.72	)		(15.54	)		(2.37	)		(2.79	)		(3.17	)		(2.93	)		(3.26	)
Net income/(loss)		(9.88	)		(10.93	)		(10.09	)		(16.44	)		(18.60	)		(17.30	)		(3.49	)		(3.37	)		(3.64	)		(3.53	)		(3.75	)
Net asset value, March 31, 2018	$	106.53		$	124.26		$	115.59		$	98.30		$	114.67		$	107.10		$	77.86		$	112.44		$	89.95		$	117.97		$	94.24
Ratios to average net assets
Net investment income/(loss)		-6.45	%		-3.44	%		-3.44	%		-8.38	%		-6.10	%		-6.10	%		-5.43	%		-2.00	%		-2.00	%		-2.00	%		-2.00	%
Expenses before incentive fees (3)(4)		6.60	%		3.58	%		3.58	%		8.70	%		6.42	%		6.42	%		5.82	%		2.39	%		2.39	%		2.39	%		2.39	%
Expenses after incentive fees (3)(4)		6.61	%		3.59	%		3.59	%		8.70	%		6.42	%		6.42	%		5.82	%		2.39	%		2.39	%		2.39	%		2.39	%
Total return before incentive fees (2)		-8.48	%		-8.08	%		-8.02	%		-14.33	%		-13.96	%		-13.91	%		-4.29	%		-2.91	%		-3.89	%		-2.91	%		-3.83	%
Total return after incentive fees (2)		-8.49	%		-8.08	%		-8.03	%		-14.33	%		-13.96	%		-13.91	%		-4.29	%		-2.91	%		-3.89	%		-2.91	%		-3.83	%

	Frontier Balanced Fund															Frontier Select Fund
	Class 1			Class 1AP			Class 2			Class 2a			Class 3a			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2017	$	135.96		$	150.56		$	202.90		$	175.77		$	175.18		$	90.27		$	100.02		$	132.73
Net operating results:
Interest income		0.05			0.05			0.07			0.06			0.06			0.00			0.00			0.00
Expenses		(2.57	)		(1.79	)		(2.41	)		(2.10	)		(2.09	)		(1.15	)		(0.57	)		(0.76	)
Net gain/(loss) on investments, net of non-controlling interests		(8.51	)		(9.49	)		(12.68	)		(11.06	)		(11.03	)		(12.65	)		(14.09	)		(18.69	)
Net income/(loss)		(11.03	)		(11.23	)		(15.02	)		(13.10	)		(13.06	)		(13.80	)		(14.66	)		(19.45	)
Net asset value, March 31, 2018	$	124.93		$	139.33		$	187.88		$	162.67		$	162.12		$	76.47		$	85.36		$	113.28
Ratios to average net assets
Net investment income/(loss)		-6.89	%		-3.89	%		-3.89	%		-3.89	%		-3.89	%		-5.46	%		-2.46	%		-2.46	%
Expenses before incentive fees (3)(4)		6.71	%		3.72	%		3.72	%		3.72	%		3.72	%		5.46	%		2.46	%		2.46	%
Expenses after incentive fees (3)(4)		7.04	%		4.05	%		4.05	%		4.05	%		4.05	%		5.46	%		2.46	%		2.46	%
Total return before incentive fees (2)		-7.79	%		-7.13	%		-7.08	%		-7.13	%		-7.13	%		-15.29	%		-14.66	%		-14.65	%
Total return after incentive fees (2)		-8.11	%		-7.46	%		-7.40	%		-7.45	%		-7.46	%		-15.29	%		-14.66	%		-14.65	%

	Frontier Winton Fund									Frontier Heritage Fund
	Class 1			Class 1AP			Class 2			Class 1			Class 1AP			Class 2
Per unit operating performance (1)
Net asset value, December 31, 2017	$	159.08		$	176.44		$	216.50		$	121.19		$	134.28		$	179.70
Net operating results:
Interest income		0.00			0.00			0.00			0.00			0.00			0.00
Expenses		(3.45	)		(2.55	)		(3.24	)		(2.46	)		(1.78	)		(2.38	)
Net gain/(loss) on investments, net of non-controlling interests		(11.03	)		(12.28	)		(16.50	)		(14.23	)		(15.86	)		(21.21	)
Net income/(loss)		(14.48	)		(14.83	)		(19.74	)		(16.69	)		(17.64	)		(23.59	)
Net asset value, March 31, 2018	$	144.60		$	161.61		$	196.76		$	104.50		$	116.64		$	156.11
Ratios to average net assets
Net investment income/(loss)		-8.98	%		-5.98	%		-5.98	%		-8.51	%		-5.52	%		-5.52	%
Expenses before incentive fees (3)(4)		8.98	%		5.98	%		5.98	%		8.49	%		5.50	%		5.50	%
Expenses after incentive fees (3)(4)		8.98	%		5.98	%		5.98	%		8.51	%		5.52	%		5.52	%
Total return before incentive fees (2)		-9.10	%		-8.41	%		-9.12	%		-13.75	%		-13.11	%		-13.10	%
Total return after incentive fees (2)		-9.10	%		-8.41	%		-9.12	%		-13.77	%		-13.14	%		-13.13	%

(1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.

(2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

(3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.

(4) Expense ratios do not include mangement and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2019

Frontier Funds [Member]

Schedule of realized trading revenue from futures, forwards and options

Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended March 31, 2019

Type of contract
Agriculturals	$	(59,562	)
Currencies		(500,661	)
Energies		(584,896	)
Interest rates		552,670
Metals		(617,340	)
Stock indices		(67,560	)
Realized trading income/(loss)(1)	$	(1,277,349	)

Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended March 31, 2018

Type of contract
Metals	$	175,869
Currencies		(333,820	)
Energies		(258,495	)
Agriculturals		(164,058	)
Interest rates		(178,994	)
Stock indices		4,746
Realized trading income/(loss)(1)	$	(754,752	)

(1) Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options.

Schedule of net trading gain loss

Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended March 31, 2019

Type of contract
Agriculturals	$	(79,579	)
Currencies		87,240
Energies		221,050
Interest rates		(234,353	)
Metals		484,455
Stock indices		46,739
Change in unrealized trading income/(loss)(1)	$	525,552

Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended March 31, 2018

Type of contract
Metals	$	(589,655	)
Currencies		(270,575	)
Energies		30,389
Agriculturals		42,190
Interest rates		312,483
Stock indices		(288,750	)
Change in unrealized trading income/(loss)(1)	$	(763,918	)

(1) Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit)

Schedule for off setting of derivative assets and liabilities

As of March 31, 2019

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Open Trade Equity/(Deficit)	$	427,769	$	(291,793	)	$	135,976
Swap Contracts		19,800,401		-			19,800,401

As of December 31, 2018

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Open Trade Equity/(Deficit)	$	3,244,057	$	(3,642,246	)	$	(398,189	)
Swap Contracts		20,149,868		-			20,149,868

The Series of the Frontier Funds [Member]

Schedule of averages futures contracts

For the Three Months ended March 31, 2019

Monthly average contracts:

	Bought		Sold
Frontier Balanced Fund		251		306

For the Three Months ended March 31, 2018

Monthly average contracts:

	Bought		Sold
Frontier Balanced Fund		1,348		1,217

Schedule of realized trading revenue from futures, forwards and options

Realized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2019

Type of contract	Frontier Balanced Fund
Agriculturals	$	(45,090	)
Currencies		(118,064	)
Energies		(29,682	)
Interest rates		235,633
Metals		(4,975	)
Stock indices		(33,296	)
Realized trading income/(loss)(1)	$	4,526

Realized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2018

Type of contract	Frontier Balanced Fund
Metals	$	(59,526	)
Currencies		17,651
Energies		48,325
Agriculturals		28,070
Interest rates		(86,844	)
Stock indices		26,652
Realized trading income/(loss)(1)	$	(25,672	)

(1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options.

Unrealized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2019

Type of contract	Frontier Balanced Fund
Agriculturals	$	(24,291	)
Currencies		(73,863	)
Energies		8,770
Interest rates		(7,691	)
Metals		2,411
Stock indices		(7,572	)
Change in unrealized trading income/(loss)(1)	$	(102,236	)

Unrealized Trading Revenue from Futures, Forwards and Options

for the Three Months Ended March 31, 2018

Type of contract	Frontier Balanced Fund
Metals	$	13,694
Currencies		(41,931	)
Energies		(44,022	)
Agriculturals		41,234
Interest rates		148,669
Stock indices		(7,379	)
Change in unrealized trading income/(loss)(1)	$	110,265

(1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).

Schedule for off setting of derivative assets and liabilities

As of March 31, 2019

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Frontier Balanced Fund
Open Trade Equity/(Deficit)	$	307,042	$	(163,216	)	$	143,826
Swap Contracts		10,599,721		-		$	10,599,721
Frontier Diversified Fund
Swap Contracts	$	5,833,765	$	-		$	5,833,765
Frontier Long/Short Commodity Fund
Swap Contracts	$	461,666	$	-		$	461,666
Frontier Heritage Fund
Swap Contracts	$	2,905,249	$	-		$	2,905,249

As of December 31, 2018

	Gross Amounts of recognized Derivative Assets		Gross Amounts offset in the Statements of Financial			Net Amounts Presented in the Statements of Financial Condition
Frontier Balanced Fund
Open Trade Equity/(Deficit)	$	348,879	$	(128,220	)	$	220,659
Swap Contracts		10,794,908		-		$	10,794,908
Frontier Diversified Fund
Swap Contracts	$	5,920,414	$	-		$	5,920,414
Frontier Long/Short Commodity Fund
Swap Contracts	$	479,102	$	-		$	479,102
Frontier Heritage Fund
Swap Contracts	$	2,955,444	$	-		$	2,955,444

XML

Organization and Purpose (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member]	3 Months Ended
	Mar. 31, 2019
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Aggregate underwriting compensation percentage	10.00%
Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%
Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Percentage of NAV charged as a service fees	3.00%
Class 2 or Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%

XML

Organization and Purpose (Frontier Funds) (Details) - Frontier Fund [Member]	3 Months Ended
	Mar. 31, 2019
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Delaware statutory trust expire date	Dec. 31, 2053
Aggregate underwriting compensation percentage	10.00%
Percentage of average daily NAV charged as a service fees	2.00%
Percentage of NAV charged as a service fees	3.00%
Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Service fee percentage	3.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 2 and Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%
Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%

XML

Significant Accounting Policies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Aggregate interest income percentage	2.00%
Managing owner percentage	2.00%
Restricted cash	$ 1,236,259	$ 1,717,065
Gross income of the Trust constitutes qualifying income	90.00%
Incentive fees percentage	10.00%
Incentive fee, description	The incentive fee exceeds 10% of new net profits during the period for a particular series, then the Managing Owner is obligated to return any amount in excess to the Series.
Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 26,419	20,430
Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	31,999	28,100
Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	283,754	258,194
Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	12,874	11,162
Frontier Global Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	142,468	133,281
Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	51,039	46,159
Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 143
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Percentage of NAV charged as a service fees	3.00%
Class 2 or Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income percentage	100.00%

XML

Significant Accounting Policies (Frontier Funds) (Details) - Frontier Fund [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Incentive fee, description	If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period, then the Managing Owner is obligated to return any amount in excess.
Subscriptions in advance	$ 548,696	$ 497,326
Frontier Trading Company I LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	1,236,259	1,717,065
Frontier Trading Company II LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	$ 7,839	$ 4,621,100
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income from all sources, including assets held at clearing brokers is paid to the Managing Owner	100.00%
Class 2 and Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] | Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] | Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] | Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 1 or Class 1a [Member] | Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] | Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] | Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%
Class 1 or Class 1a [Member] | Frontier Global Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Redemption fee percentage	3.00%
Amortized monthly annual rate	3.00%

XML

Fair Value Measurements (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Swap Contracts	$ 5,833,765	$ 5,920,414
U.S. Treasury Securities		1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	19,736	1,160,910
Swap Contracts	5,833,765	5,920,414
U.S. Treasury Securities		1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	19,736	1,157,971
Swap Contracts
U.S. Treasury Securities		1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies		2,939
Swap Contracts
U.S. Treasury Securities
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	5,833,765	5,920,414
U.S. Treasury Securities
Frontier Masters Fund [Member]
Swap Contracts
U.S. Treasury Securities	31,044	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	15,106	775,088
U.S. Treasury Securities	31,044	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	15,106	772,732
U.S. Treasury Securities	31,044	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies		2,356
U.S. Treasury Securities
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member]
Swap Contracts	461,666	479,102
U.S. Treasury Securities	184,850	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	23,927	28,163
Swap Contracts	461,666	479,102
U.S. Treasury Securities	184,850	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	23,927	28,163
Swap Contracts
U.S. Treasury Securities	184,850	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts
Investments in Private Investment Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	461,666	479,102
U.S. Treasury Securities
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	73,545	1,744,999
Open Trade Equity (Deficit)	143,826	220,659
Swap Contracts	10,599,721	10,794,908
U.S. Treasury Securities	288,004	123,409
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	73,545	1,739,609
Open Trade Equity (Deficit)	214,486	242,860
Swap Contracts
U.S. Treasury Securities	288,004	123,409
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies		5,390
Open Trade Equity (Deficit)	(70,660)	(22,201)
Swap Contracts
U.S. Treasury Securities
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts	10,599,721	10,794,908
U.S. Treasury Securities
Frontier Select Fund [Member]
Swap Contracts
U.S. Treasury Securities	98,635	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	500,149	523,180
U.S. Treasury Securities	98,635	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	12,767	11,462
U.S. Treasury Securities	98,635	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies	487,382	511,718
U.S. Treasury Securities
Frontier Global Fund [Member]
Swap Contracts
U.S. Treasury Securities	2,026,585	3,126,551
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	319,038
U.S. Treasury Securities	2,026,585
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	319,038
U.S. Treasury Securities	2,026,585
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Global Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies		4,292,075
U.S. Treasury Securities		3,126,551
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies		4,280,023
U.S. Treasury Securities		3,126,551
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies		12,052
U.S. Treasury Securities
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member]
Swap Contracts	2,905,249	2,955,444
U.S. Treasury Securities	177,918	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	31,389	726,686
Swap Contracts	2,905,249	2,955,444
U.S. Treasury Securities	177,918	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Unconsolidated Trading Companies	31,389	724,614
Swap Contracts
U.S. Treasury Securities	177,918	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Unconsolidated Trading Companies		2,072
Swap Contracts
U.S. Treasury Securities
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	2,905,249	2,955,444
U.S. Treasury Securities

XML

Fair Value Measurements (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Frontier Select Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Beginning, Balance of recurring Level 3 assets	$ 511,718	$ 579,073	$ 579,073
Change in fair value of investments in unconsolidated trading companies			(67,355)
Purchases of investments of unconsolidated trading companies
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets			511,718
Frontier Balanced Fund [Member] | Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	10,794,908	11,340,959	11,340,959
Included in earnings-realized
Included in earnings-unrealized	(195,187)		1,453,948
Proceeds from collateral reduction			(1,999,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	10,599,721		10,794,908
Frontier Long/Short Commodity Fund [Member]
Total gains or losses (realized/unrealized):	560	(58)
Frontier Long/Short Commodity Fund [Member] | Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	479,102	397,039	397,039
Included in earnings-realized
Included in earnings-unrealized	(17,436)		82,063
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	461,666		479,102
Frontier Diversified Fund [Member]
Total gains or losses (realized/unrealized):	84,498	149,643
Frontier Diversified Fund [Member] | Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	5,920,414	6,376,472	6,376,472
Included in earnings-realized
Included in earnings-unrealized	(86,649)		643,941
Proceeds from collateral reduction			(1,099,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	5,833,765		5,920,414
Frontier Heritage Fund [Member]
Total gains or losses (realized/unrealized):	56,952	123,502
Frontier Heritage Fund [Member] | Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	2,955,444	3,094,367	3,094,367
Included in earnings-realized
Included in earnings-unrealized	(50,194)		(138,923)
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	2,905,249		2,955,444
Frontier Select Fund [Member]
Total gains or losses (realized/unrealized):	25,473	$ (5,578)
Frontier Select Fund [Member] | Fair Value, Inputs, Level 3 [Member] | Investment in Unconsolidated Trading Companies [Member]
Beginning, Balance of recurring Level 3 assets	511,718
Change in fair value of investments in unconsolidated trading companies	(24,336)
Purchases of investments of unconsolidated trading companies
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 487,382		$ 511,718

XML

Fair Value Measurements (The Series of the Frontier Funds) (Details 2) - Swap Contracts [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Total change in unrealized appreciation (depreciation)	$ (86,649)	$ 643,941
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Total change in unrealized appreciation (depreciation)	(17,436)	82,063
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Total change in unrealized appreciation (depreciation)	(195,187)	1,453,948
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Total change in unrealized appreciation (depreciation)	(50,194)	(138,923)
Investments in Unconsolidated Trading Companies [Member] | Frontier Select Fund [Member]
Total change in unrealized appreciation (depreciation)	$ (24,336)	$ (67,355)

XML

Fair Value Measurements (Frontier Funds) (Details) - Fair Value, Measurements, Recurring [Member] - Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Open Trade Equity (Deficit)	$ 135,976	$ (398,189)
Swap Contracts	19,800,401	20,149,868
U.S. Treasury Securities	2,807,036	5,684,327
Level 1 Inputs [Member]
Open Trade Equity (Deficit)	206,634	(400,796)
Swap Contracts
U.S. Treasury Securities	2,807,036	5,684,327
Level 2 Inputs [Member]
Open Trade Equity (Deficit)	(70,658)	2,607
Swap Contracts
U.S. Treasury Securities
Level 3 Inputs [Member]
Open Trade Equity (Deficit)
Swap Contracts	19,800,401	20,149,868
U.S. Treasury Securities

XML

Fair Value Measurements (Frontier Funds) (Details 1) - Level 3 Inputs [Member] - Frontier Funds [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Beginning, Balance of recurring Level 3 assets	$ 20,149,868	$ 21,208,838
Included in earnings-realized
Included in earnings-unrealized	(349,467)	2,041,028
Proceeds from collateral reduction		(3,099,998)
Purchase of investments
Sale of investments
Transfers in and/or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 19,800,401	$ 20,149,868

XML

Fair Value Measurements (Frontier Funds) (Details 2) - Swap [Member] - Frontier Funds [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Total change in unrealized appreciation (depreciation)	$ (349,467)	$ 2,041,028
Differences in prices percentage	5.00%

XML

Swap Contracts (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Swap [Member] - DeutscheBank AG [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member]
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 10,513,721	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(195,186)	1,453,948
Fair Value	10,599,721	10,794,908
Advance on swap appreciation	(6,176,555)	(6,176,555)
Frontier Diversified Fund [Member]
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 5,747,765	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(86,648)	643,941
Fair Value	5,833,765	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
Frontier Long/Short Commodity Fund [Member]
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 431,716	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(17,436)	82,063
Fair Value	461,666	479,102
Advance on swap appreciation	(115,000)	(115,000)
Frontier Heritage Fund [Member]
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 978,950	$ 978,950
Swap Value	$ 1,926,299	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(50,194)	(138,924)
Fair Value	2,905,249	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ (1,900,000)

XML

Swap Contracts (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Swap Contracts (The Series of the Frontier Funds) (Textual)
Percentage of trust’s assets were deposited with over-the-counter counterparties	1.80%	1.60%
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%
Frontier Balanced Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 6,176,555
Frontier Diversified Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	4,000,000	$ 4,000,000
Frontier Long/Short Commodity Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	115,000	115,000
Frontier Heritage Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 1,900,000	$ 1,900,000

XML

Swaps Contracts (Frontier Funds) (Details) - Frontier Funds [Member] - DeutscheBank AG [Member] - Swap [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
XXXIV Balanced Select Swap [Member]
Counterparty
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 10,513,721	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(195,186)	1,453,948
Fair Value	10,599,721	10,794,908
Advance on swap appreciation	(6,176,555)	(6,176,555)
XXXV Diversified Select Swap [Member]
Counterparty
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 5,747,765	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	86,648	643,941
Fair Value	5,833,765	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
XXXVII L/S Select Swap [Member]
Counterparty
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 431,716	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(17,436)	82,063
Fair Value	461,666	479,102
Advance on swap appreciation	(115,000)	(115,000)
Brevan Howard [Member]
Counterparty
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 978,950	$ 978,950
Swap Value	$ 1,926,299	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(50,194)	(138,924)
Fair Value	2,905,249	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ 1,900,000

XML

Swaps Contracts (Frontier Funds) (Details Textual)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Frontier Funds [Member]
Description of deposits assets	1.82% or $1,180,900	1.46% or $1,180,900

XML

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Fair Value	$ 19,736	$ 1,160,910
Frontier Diversified Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.14%	7.19%
Fair Value	$ 19,736	$ 1,160,910
Frontier Masters Fund [Member]
Fair Value	$ 15,106	$ 775,088
Frontier Masters Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.30%	13.91%
Fair Value	$ 15,106	$ 775,088
Frontier Long/Short Commodity Fund [Member]
Fair Value	$ 23,927	$ 28,163
Frontier Long/Short Commodity Fund [Member] | Frontier Trading Company XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.12%	1.15%
Fair Value	$ 23,927	$ 28,163
Frontier Balanced Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.27%	5.48%
Fair Value	$ 73,545	$ 1,744,999
Frontier Select Fund [Member]
Fair Value	$ 500,149	$ 523,180
Frontier Select Fund [Member] | Frontier Trading Companies XXXVIII and XXXIX [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	13.63%	13.56%
Fair Value	$ 500,149	$ 523,180
Frontier Global Fund [Member]
Fair Value	$ 319,038	$ 4,292,075
Frontier Global Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	4.27%	52.30%
Fair Value	$ 319,038	$ 4,292,075
Frontier Heritage Fund [Member]
Fair Value	$ 31,388	$ 726,686
Frontier Heritage Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.72%	16.27%
Fair Value	$ 31,389	$ 726,686

XML

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Frontier Balanced Fund [Member]
Trading Commissions	$ (185,798)	$ (315,287)
Realized Gain/(Loss)	2,453,394	(2,416,208)
Change in Unrealized Gain/(Loss)	(2,249,646)	(1,287,006)
Net Income (Loss)	17,950	(4,018,501)
Frontier Global Fund [Member]
Trading Commissions	(54,326)
Realized Gain/(Loss)	265,913
Change in Unrealized Gain/(Loss)	148,257	(1,029,677)
Net Income (Loss)	359,844	(1,029,677)
Frontier Select Fund [Member]
Trading Commissions	(39,786)	(88,479)
Realized Gain/(Loss)	(20,365)	(630,587)
Change in Unrealized Gain/(Loss)	66,496	(155,981)
Net Income (Loss)	6,345	(875,047)
Frontier Heritage Fund [Member]
Trading Commissions	(45,105)	(52,775)
Realized Gain/(Loss)	4,931	(544,577)
Change in Unrealized Gain/(Loss)	117,301	(66,620)
Net Income (Loss)	77,127	(663,972)
Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(27,117)	(55,359)
Realized Gain/(Loss)	231,028	(59,385)
Change in Unrealized Gain/(Loss)	(339,552)	(51,501)
Net Income (Loss)	(135,641)	(166,245)
Frontier Diversified Fund [Member]
Trading Commissions	(125,782)	(178,220)
Realized Gain/(Loss)	1,315,453	(1,110,116)
Change in Unrealized Gain/(Loss)	(1,163,866)	(649,039)
Net Income (Loss)	25,805	(1,937,375)
Frontier Masters Fund [Member]
Trading Commissions	(88,866)	(172,176)
Realized Gain/(Loss)	894,552	(421,253)
Change in Unrealized Gain/(Loss)	(906,550)	(823,621)
Net Income (Loss)	(100,864)	(1,417,050)
Frontier Trading Company II LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(139,281)	(303,227)
Net Income (Loss)	(139,281)	(303,227)
Frontier Trading Company II LLC [Member] | Frontier Global Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(313,867)	(992,595)
Net Income (Loss)	(313,867)	(992,595)
Frontier Trading Company II LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(54,170)	(122,535)
Net Income (Loss)	(54,170)	(122,535)
Frontier Trading Company II LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(75,905)	(150,626)
Net Income (Loss)	(75,905)	(150,626)
Frontier Trading Company II LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(61,450)	(241,769)
Net Income (Loss)	(61,450)	(241,769)
Frontier Trading Company XXXVIII [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	1,011	(4,595)
Net Income (Loss)	1,011	(4,595)
Frontier Trading Company XXXVIII [Member] | Frontier Global Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(14,396)	(37,082)
Net Income (Loss)	(14,396)	(37,082)
Frontier Trading Company XXXVIII [Member] | Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,137)	5,578
Net Income (Loss)	(1,137)	5,578
Frontier Trading Company XXXVIII [Member] | Frontier Heritage Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(2,782)	(967)
Net Income (Loss)	(2,782)	(967)
Frontier Trading Company XXXVIII [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(560)	58
Net Income (Loss)	(560)	58
Frontier Trading Company XXXVIII [Member] | Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	223	8,414
Net Income (Loss)	223	8,414
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(14,414)	(33,442)
Realized Gain/(Loss)	134,933	(53,706)
Change in Unrealized Gain/(Loss)	463,481	(65,693)
Net Income (Loss)	584,000	(152,841)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Global Fund [Member]
Trading Commissions	(54,326)
Realized Gain/(Loss)	265,913
Change in Unrealized Gain/(Loss)	476,520
Net Income (Loss)	688,107
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions	(17,028)
Realized Gain/(Loss)	62,603
Change in Unrealized Gain/(Loss)	154,712
Net Income (Loss)	200,287
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(10,457)	(16,472)
Realized Gain/(Loss)	87,032	(17,902)
Change in Unrealized Gain/(Loss)	227,597	(21,898)
Net Income (Loss)	304,172	(56,272)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(14,148)
Realized Gain/(Loss)	62,838
Change in Unrealized Gain/(Loss)	130,340
Net Income (Loss)	179,030
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(10,613)	(16,672)
Realized Gain/(Loss)	36,954	(289,977)
Change in Unrealized Gain/(Loss)	(66,548)	39,719
Net Income (Loss)	(40,207)	(266,930)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(8,034)	(10,111)
Realized Gain/(Loss)	22,419	(143,967)
Change in Unrealized Gain/(Loss)	(40,480)	22,561
Net Income (Loss)	(26,095)	(131,517)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(68,811)	(87,246)
Realized Gain/(Loss)	2,295,369	799,734
Change in Unrealized Gain/(Loss)	(2,658,416)	(791,836)
Net Income (Loss)	(431,858)	(79,348)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(14,831)	(29,775)
Realized Gain/(Loss)	257,430	170,180
Change in Unrealized Gain/(Loss)	(307,997)	(161,895)
Net Income (Loss)	(65,398)	(21,490)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(41,832)	(46,698)
Realized Gain/(Loss)	1,211,166	399,867
Change in Unrealized Gain/(Loss)	(1,421,023)	(395,918)
Net Income (Loss)	(251,689)	(42,749)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(40,309)	(78,638)
Realized Gain/(Loss)	905,986	470,101
Change in Unrealized Gain/(Loss)	(1,066,728)	(474,473)
Net Income (Loss)	(201,051)	(83,010)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(8,968)	(20,107)
Realized Gain/(Loss)	765,891	(471,750)
Change in Unrealized Gain/(Loss)	110,042	73,955
Net Income (Loss)	866,965	(417,902)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(9,730)	(9,673)
Realized Gain/(Loss)	459,662	(152,263)
Change in Unrealized Gain/(Loss)	70,240	32,729
Net Income (Loss)	520,172	(129,207)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(18,750)	35,643
Net Income (Loss)	(18,750)	35,643
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(29,334)	93,458
Net Income (Loss)	(29,334)	93,458
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(7,545)	17,509
Net Income (Loss)	(7,545)	17,509
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(28,901)	(35,900)
Realized Gain/(Loss)	(608,323)	(900,196)
Change in Unrealized Gain/(Loss)	5,649	(363,122)
Net Income (Loss)	(631,575)	(1,299,218)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(19,793)	(21,385)
Realized Gain/(Loss)	(388,707)	(468,883)
Change in Unrealized Gain/(Loss)	10,691	(175,777)
Net Income (Loss)	(397,809)	(666,045)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(25,311)	(41,561)
Realized Gain/(Loss)	24,230	76,468
Change in Unrealized Gain/(Loss)	(15,747)	(5,773)
Net Income (Loss)	(16,828)	29,134
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(13,254)	(25,502)
Realized Gain/(Loss)	10,639	38,234
Change in Unrealized Gain/(Loss)	(6,777)	(2,886)
Net Income (Loss)	(9,392)	9,846
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(4,268)	(6,723)
Realized Gain/(Loss)	(10,217)	11,076
Change in Unrealized Gain/(Loss)	27,339	(22,123)
Net Income (Loss)	12,854	(17,770)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(4,958)	(7,647)
Realized Gain/(Loss)	(5,517)	11,076
Change in Unrealized Gain/(Loss)	30,375	(22,123)
Net Income (Loss)	19,900	(18,694)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Balanced Fund [Member]
Trading Commissions	(24,512)	(73,636)
Realized Gain/(Loss)	(185,443)	(1,587,857)
Change in Unrealized Gain/(Loss)	41,574	120,046
Net Income (Loss)	(168,381)	(1,541,447)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Select Fund [Member]
Trading Commissions	(15,472)	(50,983)
Realized Gain/(Loss)	32,894	(548,310)
Change in Unrealized Gain/(Loss)	83,870	30,050
Net Income (Loss)	101,292	(569,243)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Heritage Fund [Member]
Trading Commissions	(28,077)	(52,775)
Realized Gain/(Loss)	(57,672)	(544,577)
Change in Unrealized Gain/(Loss)	19,541	56,882
Net Income (Loss)	(66,208)	(540,470)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions	(12,286)	(25,584)
Realized Gain/(Loss)	(26,402)	(229,565)
Change in Unrealized Gain/(Loss)	(1,661)	16,878
Net Income (Loss)	(40,349)	(238,271)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Diversified Fund [Member]
Trading Commissions	(17,724)	(40,732)
Realized Gain/(Loss)	(81,241)	(776,278)
Change in Unrealized Gain/(Loss)	57,554	46,407
Net Income (Loss)	(41,411)	(770,603)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(10,776)	(55,931)
Realized Gain/(Loss)	(5,435)	(699,656)
Change in Unrealized Gain/(Loss)	85,443	30,089
Net Income (Loss)	69,232	(725,498)
Frontier Trading Company XXXIX, LLC [Member] | Frontier Select Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(24,336)
Net Income (Loss)	(24,336)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] | Frontier Select Fund [Member]
Trading Commissions	(24,314)	(37,496)
Realized Gain/(Loss)	(53,259)	(82,277)
Change in Unrealized Gain/(Loss)	8,099	(191,609)
Net Income (Loss)	(69,474)	(311,382)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions	(23,633)	(37,607)
Realized Gain/(Loss)	(68,837)	(115,302)
Change in Unrealized Gain/(Loss)	5,622	(214,295)
Net Income (Loss)	(86,848)	(367,204)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member] | Frontier Long/Short Commodity Fund [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member] | Frontier Masters Fund [Member]
Trading Commissions
Realized Gain/(Loss)		(76,396)
Change in Unrealized Gain/(Loss)		68,413
Net Income (Loss)		$ (7,983)

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Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member]	3 Months Ended
	Mar. 31, 2019
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Select Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Select Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Heritage Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Global Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

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Investments in Private Investment Companies (Frontier Funds) (Details) - Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Trading Commissions	$ (566,780)	$ (862,296)
Realized Gain/(Loss)	5,144,906	(5,179,780)
Change in Unrealized Gain/(Loss)	(3,663,800)	(2,252,693)
Net Income (Loss)	914,326	(8,294,769)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Trading Commissions	(110,373)
Realized Gain/(Loss)	613,319
Change in Unrealized Gain/(Loss)	1,452,650
Net Income (Loss)	1,955,596
Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member]
Trading Commissions
Realized Gain/(Loss)		(76,396)
Change in Unrealized Gain/(Loss)		68,413
Net Income (Loss)		(7,983)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Trading Commissions	(18,647)	(26,783)
Realized Gain/(Loss)	59,373	(433,944)
Change in Unrealized Gain/(Loss)	(107,028)	62,280
Net Income (Loss)	(66,302)	(398,447)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Trading Commissions	(165,783)	(242,357)
Realized Gain/(Loss)	4,669,951	1,839,882
Change in Unrealized Gain/(Loss)	(5,454,164)	(1,824,122)
Net Income (Loss)	(949,996)	(226,597)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Trading Commissions	(18,698)	(29,780)
Realized Gain/(Loss)	1,225,553	(624,013)
Change in Unrealized Gain/(Loss)	180,282	106,684
Net Income (Loss)	1,387,137	(547,109)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(55,629)	146,610
Net Income (Loss)	(55,629)	146,610
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Trading Commissions	(48,694)	(57,285)
Realized Gain/(Loss)	(997,030)	(1,369,079)
Change in Unrealized Gain/(Loss)	16,340	(538,899)
Net Income (Loss)	(1,029,384)	(1,965,263)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Trading Commissions	(38,565)
Realized Gain/(Loss)	34,869
Change in Unrealized Gain/(Loss)	(22,524)
Net Income (Loss)	(26,220)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Trading Commissions	(9,226)
Realized Gain/(Loss)	(15,734)
Change in Unrealized Gain/(Loss)	57,714
Net Income (Loss)	32,754
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC [Member]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(31,483)	(27,611)
Net Income (Loss)	(31,483)	(27,611)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Trading Commissions	(47,947)	(75,103)
Realized Gain/(Loss)	(122,096)	(197,579)
Change in Unrealized Gain/(Loss)	13,721	(405,904)
Net Income (Loss)	(156,322)	(678,586)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Trading Commissions	(108,847)
Realized Gain/(Loss)	(323,299)
Change in Unrealized Gain/(Loss)	286,321
Net Income (Loss)	$ (145,825)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Trading Commissions		(49,914)
Realized Gain/(Loss)		(71,608)
Change in Unrealized Gain/(Loss)		(87,591)
Net Income (Loss)		(209,113)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Trading Commissions		(67,063)
Realized Gain/(Loss)		114,702
Change in Unrealized Gain/(Loss)		(8,659)
Net Income (Loss)		38,980
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Trading Commissions		(14,370)
Realized Gain/(Loss)		24,498
Change in Unrealized Gain/(Loss)		(44,246)
Net Income (Loss)		(34,118)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Trading Commissions		(299,641)
Realized Gain/(Loss)		(4,386,243)
Change in Unrealized Gain/(Loss)		300,352
Net Income (Loss)		$ (4,385,532)

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Investments in Private Investment Companies (Frontier Funds) (Details 1) - Frontier Funds [Member]	3 Months Ended
	Mar. 31, 2019
Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

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Transactions with Affiliates (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Frontier Diversified Fund [Member]
Incentive (Rebate) Fees		$ 1,881
Management Fee	2,668	11,563
Service Fee	12,029	16,115
Trading Fee	130,304	165,150
Frontier Masters Fund [Member]
Incentive (Rebate) Fees
Management Fee	5,593	32,349
Service Fee	7,486	14,969
Trading Fee	67,318	134,048
Frontier Long/Short Commodity Fund [Member]
Incentive (Rebate) Fees
Management Fee
Service Fee	162	657
Trading Fee	13,852	24,693
Frontier Balanced Fund [Member]
Incentive (Rebate) Fees		145,134
Management Fee	8,079	20,336
Service Fee	170,865	262,981
Trading Fee	279,337	384,176
Frontier Select Fund [Member]
Incentive (Rebate) Fees
Management Fee
Service Fee	25,505	39,689
Trading Fee	22,632	37,594
Frontier Global Fund [Member]
Incentive (Rebate) Fees
Management Fee	29,148	130,660
Service Fee	52,123	94,260
Trading Fee	42,715	82,575
Frontier Heritage Fund [Member]
Incentive (Rebate) Fees		1,394
Management Fee	6,189	35,981
Service Fee	23,185	37,108
Trading Fee	$ 27,093	$ 42,292

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Transactions with Affiliates (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Incentive Fees		$ 10,897
Management Fees		3,875
Interest Fees
Service Fees	2,490	4,498
Trading Fees Payable	42,268	44,827
Frontier Masters Fund [Member]
Incentive Fees
Management Fees		8,347
Interest Fees
Service Fees	1,287	1,750
Trading Fees Payable	23,323	27,984
Frontier Long/Short Commodity Fund [Member]
Incentive Fees
Management Fees
Interest Fees
Service Fees	7	51
Trading Fees Payable	4,103	5,306
Frontier Balanced Fund [Member]
Incentive Fees
Management Fees	8,966	13,917
Interest Fees	1,237	1,490
Service Fees	47,153	56,791
Trading Fees Payable	88,587	101,770
Frontier Select Fund [Member]
Incentive Fees
Management Fees
Interest Fees	37
Service Fees	7,907	8,575
Trading Fees Payable	7,483	7,812
Frontier Global Fund [Member]
Incentive Fees
Management Fees		42,705
Interest Fees	5,504	8,124
Service Fees	13,888	17,803
Trading Fees Payable	19,141	24,353
Frontier Heritage Fund [Member]
Incentive Fees
Management Fees		9,201
Interest Fees	619	1,238
Service Fees	6,058	6,684
Trading Fees Payable	$ 11,257	$ 10,189

XML

Transactions with Affiliates (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Managing Owner [Member]
Gross Amount Paid to the Managing Owner	$ 25,609	$ 55,400
Frontier Diversified Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Diversified Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Diversified Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Masters Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Masters Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Masters Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 6	$ 50
Ratio to Average Net Assets	0.00%	0.02%
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner	$ 127	$ 541
Ratio to Average Net Assets	0.01%	0.02%
Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Balanced Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 1,731	$ 11,898
Ratio to Average Net Assets	0.01%	0.03%
Frontier Balanced Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 323	$ 2,138
Ratio to Average Net Assets	0.01%	0.03%
Frontier Balanced Fund [Member] | Class 2a [Member]
Gross Amount Paid to the Managing Owner	$ 4	$ 45
Ratio to Average Net Assets	0.00%	0.01%
Frontier Balanced Fund [Member] | Class 3a [Member]
Gross Amount Paid to the Managing Owner	$ 13	$ 127
Ratio to Average Net Assets	0.00%	0.01%
Frontier Balanced Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 26	$ 192
Ratio to Average Net Assets	0.01%	0.03%
Frontier Select Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 859	$ 2,460
Ratio to Average Net Assets	0.01%	0.05%
Frontier Select Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 30	$ 366
Ratio to Average Net Assets	0.01%	0.05%
Frontier Select Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner		$ 10
Ratio to Average Net Assets	0.00%	0.04%
Frontier Global Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 18,729	$ 28,689
Ratio to Average Net Assets	0.27%	0.22%
Frontier Global Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 1,034	$ 3,777
Ratio to Average Net Assets	0.26%	0.23%
Frontier Global Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 84	$ 83
Ratio to Average Net Assets	0.27%	0.22%
Frontier Heritage Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 2,228	$ 4,383
Ratio to Average Net Assets	0.07%	0.09%
Frontier Heritage Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 414	$ 636
Ratio to Average Net Assets	0.07%	0.09%
Frontier Heritage Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 1	$ 5
Ratio to Average Net Assets	0.10%	0.09%

XML

Transactions with Affiliates (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member] - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Transactions with Affiliates (Textual)
Description of incentive fee percentage	The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund, Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund.
Description of range of incentive fee percentage	(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.	(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.
Description of service fees	Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.
Description of interest income	Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a, and Class 3a only), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a) 100% of the interest is retained by the respective Series.
Frontier Balanced Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 283,754
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	143
Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	26,419
Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	31,999
Frontier Global Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	142,468
Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	51,039
Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 12,874
Managing Owner [Member]
Transactions with Affiliates (Textual)
Percentage of minimum purchase commitment	1.00%
Percentage of contributes funds to trust	1.00%
Percentage of interest in specific series of trust	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Textual)
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1AP [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.50%	1.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%
Managing Owner [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	0.75%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] | Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest	1.00%
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%
Managing Owner [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Managing Owner [Member] | Frontier Select Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%

XML

Transactions with Affiliates (Frontier Funds) (Details) - Frontier Funds [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Transactions with Affiliates (Frontier Funds) (Textual)
Trust paid for incentive fees		$ 148,409
Trust paid for management fees	51,677	230,889
Trust paid for service fees	291,355	465,780
Trust paid for trading fees	$ 583,251	870,525
Managing Owner [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of contributes funds to trust	1.00%
Percentage of minimum purchase commitment	1.00%
Percentage of interest in specific series of trust	1.00%
Trust had payable for incentive fees	$ 0		$ 10,897
Trust had payable for management fees	8,966		78,045
Trust had payable for interest fees	7,397		10,852
Trust had payable for service fees	78,790		96,152
Trust had payable for risk analysis fees	15,267
Trust had payable for trading fees	196,162		$ 222,241
Trust paid for incentive fees	0	148,409
Trust paid for management fees	51,677	230,889
Trust paid for risk analysis fees	6,692	22,798
Trust paid for service fees	291,355	465,780
Trust paid for trading fees	583,251	870,525
Prepaid initial service fees	0	0
Trust paid	$ 25,609	$ 55,400
Managing Owner [Member] | Class 1 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	3.00%
Managing Owner [Member] | Class 1a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	2.00%
Managing Owner [Member] | Class 2 Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	0.25%
Managing Owner [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	25.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1 and Class 2 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.50%
Percentage of aggregate interest income	2.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Percentage of interest is retained by respective series	100.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.50%
Percentage of incentive fee	25.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of interest is retained by respective series	100.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 and Class 3 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	3.50%
Percentage of aggregate interest income	2.00%
Managing Owner [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.75%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	25.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%
Managing Owner [Member] | Frontier Masters Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Managing Owner [Member] | Frontier Masters Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Masters Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Managing Owner [Member] | Frontier Masters Fund [Member] | Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%
Managing Owner [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%
Managing Owner [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%
Managing Owner [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Percentage of incentive fee	15.00%
Managing Owner [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%

XML

Financial Highlights (The Series of the Frontier Funds) (Details) - Series of Frontier Funds [Member] - $ / shares		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Frontier Diversified Fund [Member] | Class 1 [Member]
Net asset value		$ 102.25	$ 116.41
Interest income	[1]	0.03	0.04
Expenses	[1]	(1.63)	(1.82)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.19	(8.10)
Net income/(loss)	[1]	(1.41)	(9.88)
Net asset value	[1],[2]	$ 100.84	$ 106.53
Net investment income/(loss)		(6.58%)	(6.45%)
Expenses before incentive fees	[3],[4]	6.71%	6.60%
Expenses after incentive fees	[3],[4]	6.71%	6.61%
Total return before incentive fee	[5]	(1.38%)	(8.48%)
Total return after incentive fees	[5]	(1.38%)	(8.49%)
Frontier Diversified Fund [Member] | Class 2 [Member]
Net asset value		$ 120.84	$ 135.19
Interest income	[1]	0.04	0.05
Expenses	[1]	(1.05)	(1.16)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(0.14)	(9.82)
Net income/(loss)	[1]	(1.15)	(10.93)
Net asset value	[1],[2]	$ 119.69	$ 124.26
Net investment income/(loss)		(3.51%)	(3.44%)
Expenses before incentive fees	[3],[4]	3.64%	3.58%
Expenses after incentive fees	[3],[4]	3.64%	3.59%
Total return before incentive fee	[5]	(0.95%)	(8.08%)
Total return after incentive fees	[5]	(0.95%)	(8.08%)
Frontier Diversified Fund [Member] | Class 3 [Member]
Net asset value		$ 112.62	$ 125.68
Interest income	[1]	0.04	0.05
Expenses	[1]	(0.98)	(1.08)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(0.06)	(9.06)
Net income/(loss)	[1]	(1.00)	(10.09)
Net asset value	[1],[2]	$ 111.62	$ 115.59
Net investment income/(loss)		(3.51%)	(3.44%)
Expenses before incentive fees	[3],[4]	3.64%	3.58%
Expenses after incentive fees	[3],[4]	3.64%	3.59%
Total return before incentive fee	[5]	(0.90%)	(8.02%)
Total return after incentive fees	[5]	(0.90%)	(8.03%)
Frontier Masters Fund [Member] | Class 1 [Member]
Net asset value		$ 91.10	$ 114.74
Interest income	[1]	0.01	0.09
Expenses	[1]	(1.69)	(2.29)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.23)	(14.24)
Net income/(loss)	[1]	(2.91)	(16.44)
Net asset value	[1],[2]	$ 88.19	$ 98.30
Net investment income/(loss)		8.08%	(8.38%)
Expenses before incentive fees	[3],[4]	8.14%	8.70%
Expenses after incentive fees	[3],[4]	8.14%	8.70%
Total return before incentive fee	[5]	(3.19%)	(14.33%)
Total return after incentive fees	[5]	(3.19%)	(14.33%)
Frontier Masters Fund [Member] | Class 2 [Member]
Net asset value		$ 107.68	$ 133.27
Interest income	[1]	0.01	0.10
Expenses	[1]	(1.46)	(1.98)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.54)	(16.72)
Net income/(loss)	[1]	(2.99)	(18.60)
Net asset value	[1],[2]	$ 104.69	$ 114.67
Net investment income/(loss)		(5.87%)	(6.10%)
Expenses before incentive fees	[3],[4]	5.93%	6.42%
Expenses after incentive fees	[3],[4]	5.93%	6.42%
Total return before incentive fee	[5]	(2.78%)	(13.96%)
Total return after incentive fees	[5]	(2.78%)	(13.96%)
Frontier Masters Fund [Member] | Class 3 [Member]
Net asset value		$ 100.77	$ 124.40
Interest income	[1]	0.01	0.09
Expenses	[1]	(1.37)	(1.85)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.37)	(15.54)
Net income/(loss)	[1]	(2.73)	(17.30)
Net asset value	[1],[2]	$ 98.04	$ 107.10
Net investment income/(loss)		(5.87%)	(6.10%)
Expenses before incentive fees	[3],[4]	5.93%	6.42%
Expenses after incentive fees	[3],[4]	5.93%	6.42%
Total return before incentive fee	[5]	(2.71%)	(13.91%)
Total return after incentive fees	[5]	(2.71%)	(13.91%)
Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Net asset value		$ 98.82	$ 115.81
Interest income	[1]	0.03	0.11
Expenses	[1]	(0.59)	(0.69)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(4.59)	(2.79)
Net income/(loss)	[1]	(5.15)	(3.37)
Net asset value	[1],[2]	$ 93.67	$ 112.44
Net investment income/(loss)		(2.46%)	(2.00%)
Expenses before incentive fees	[3],[4]	(2.60%)	2.39%
Expenses after incentive fees	[3],[4]	(2.60%)	2.39%
Total return before incentive fee	[5]	(5.21%)	(2.91%)
Total return after incentive fees	[5]	(5.21%)	(2.91%)
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Net asset value		$ 103.66	$ 121.50
Interest income	[1]	0.03	0.12
Expenses	[1]	(0.62)	(0.72)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(4.82)	(2.93)
Net income/(loss)	[1]	(5.41)	(3.53)
Net asset value	[1],[2]	$ 98.25	$ 117.97
Net investment income/(loss)		(2.46%)	(200.00%)
Expenses before incentive fees	[3],[4]	(2.60%)	2.39%
Expenses after incentive fees	[3],[4]	(2.60%)	2.39%
Total return before incentive fee	[5]	(5.22%)	(2.91%)
Total return after incentive fees	[5]	(5.22%)	(2.91%)
Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Net asset value		$ 56.80	$ 81.35
Interest income	[1]	0.02	0.08
Expenses	[1]	(0.77)	(1.20)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(5.90)	(2.37)
Net income/(loss)	[1]	(6.66)	(3.49)
Net asset value	[1],[2]	$ 50.14	$ 77.86
Net investment income/(loss)		(6.28%)	(5.43%)
Expenses before incentive fees	[3],[4]	6.41%	5.82%
Expenses after incentive fees	[3],[4]	6.41%	5.82%
Total return before incentive fee	[5]	(11.73%)	(4.29%)
Total return after incentive fees	[5]	(11.73%)	(4.29%)
Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Net asset value		$ 66.52	$ 93.59
Interest income	[1]	0.02	0.09
Expenses	[1]	(0.37)	(0.56)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(7.21)	(3.17)
Net income/(loss)	[1]	(7.56)	(3.64)
Net asset value	[1],[2]	$ 58.96	$ 89.95
Net investment income/(loss)		(2.46%)	(200.00%)
Expenses before incentive fees	[3],[4]	(2.60%)	2.39%
Expenses after incentive fees	[3],[4]	(2.60%)	2.39%
Total return before incentive fee	[5]	(11.37%)	(3.89%)
Total return after incentive fees	[5]	(11.37%)	(3.89%)
Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Net asset value		$ 69.83	$ 97.99
Interest income	[1]	0.02	0.10
Expenses	[1]	(0.39)	(0.59)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(7.49)	(3.26)
Net income/(loss)	[1]	(7.87)	(3.75)
Net asset value	[1],[2]	$ 61.96	$ 94.24
Net investment income/(loss)		(2.46%)	(200.00%)
Expenses before incentive fees	[3],[4]	(2.60%)	2.39%
Expenses after incentive fees	[3],[4]	(2.60%)	2.39%
Total return before incentive fee	[5]	(11.27%)	(3.83%)
Total return after incentive fees	[5]	(11.27%)	(3.83%)
Frontier Balanced Fund [Member] | Class 1 [Member]
Net asset value		$ 117.63	$ 135.96
Interest income	[1]	0.04	0.05
Expenses	[1]	(1.97)	(2.57)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(0.82)	(8.51)
Net income/(loss)	[1]	(2.74)	(11.03)
Net asset value	[1],[2]	$ 114.89	$ 124.93
Net investment income/(loss)		(6.90%)	(6.89%)
Expenses before incentive fees	[3],[4]	7.06%	6.71%
Expenses after incentive fees	[3],[4]	7.06%	7.04%
Total return before incentive fee	[5]	(2.33%)	(7.79%)
Total return after incentive fees	[5]	(2.33%)	(8.11%)
Frontier Balanced Fund [Member] | Class 2 [Member]
Net asset value		$ 180.94	$ 202.90
Interest income	[1]	0.07	0.07
Expenses	[1]	(1.74)	(2.41)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.22)	(12.68)
Net income/(loss)	[1]	(2.90)	(15.02)
Net asset value	[1],[2]	$ 178.04	$ 187.88
Net investment income/(loss)		(3.90%)	(3.89%)
Expenses before incentive fees	[3],[4]	4.06%	3.72%
Expenses after incentive fees	[3],[4]	4.06%	4.05%
Total return before incentive fee	[5]	(1.60%)	(7.08%)
Total return after incentive fees	[5]	(1.60%)	(7.40%)
Frontier Balanced Fund [Member] | Class 2a [Member]
Net asset value		$ 156.81	$ 175.77
Interest income	[1]	0.06	0.06
Expenses	[1]	(1.51)	(2.10)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.09)	(11.06)
Net income/(loss)	[1]	(2.54)	(13.06)
Net asset value	[1],[2]	$ 154.27	$ 162.67
Net investment income/(loss)		(3.90%)	(3.89%)
Expenses before incentive fees	[3],[4]	4.06%	3.72%
Expenses after incentive fees	[3],[4]	4.06%	4.05%
Total return before incentive fee	[5]	(1.62%)	(7.13%)
Total return after incentive fees	[5]	(1.62%)	(7.45%)
Frontier Balanced Fund [Member] | Class 3a [Member]
Net asset value		$ 156.26	$ 175.18
Interest income	[1]	0.06	0.06
Expenses	[1]	(1.51)	(2.09)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(1.03)	(11.03)
Net income/(loss)	[1]	(2.48)	(13.06)
Net asset value	[1],[2]	$ 153.78	$ 162.12
Net investment income/(loss)		(3.90%)	(3.89%)
Expenses before incentive fees	[3],[4]	4.06%	3.72%
Expenses after incentive fees	[3],[4]	4.06%	4.05%
Total return before incentive fee	[5]	(1.59%)	(7.13%)
Total return after incentive fees	[5]	(1.59%)	(7.46%)
Frontier Balanced Fund [Member] | Class 1AP [Member]
Net asset value		$ 134.16	$ 150.56
Interest income	[1]	0.05	0.05
Expenses	[1]	(1.29)	(1.79)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(0.91)	(9.49)
Net income/(loss)	[1]	(2.15)	(11.23)
Net asset value	[1],[2]	$ 132.01	$ 139.33
Net investment income/(loss)		(3.90%)	(3.89%)
Expenses before incentive fees	[3],[4]	4.06%	3.72%
Expenses after incentive fees	[3],[4]	4.06%	4.05%
Total return before incentive fee	[5]	(1.60%)	(7.13%)
Total return after incentive fees	[5]	(1.60%)	(7.46%)
Frontier Select Fund [Member] | Class 1 [Member]
Net asset value		$ 71.41	$ 90.27
Interest income	[1]	0.00	0.00
Expenses	[1]	(0.92)	(1.15)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.27	(12.65)
Net income/(loss)	[1]	(0.65)	(13.80)
Net asset value	[1],[2]	$ 70.76	$ 76.47
Net investment income/(loss)		(5.58%)	(5.46%)
Expenses before incentive fees	[3],[4]	5.58%	5.46%
Expenses after incentive fees	[3],[4]	5.58%	5.46%
Total return before incentive fee	[5]	(0.91%)	(15.29%)
Total return after incentive fees	[5]	(0.91%)	(15.29%)
Frontier Select Fund [Member] | Class 2 [Member]
Net asset value		$ 108.18	$ 132.73
Interest income	[1]	0.00	0.00
Expenses	[1]	(0.65)	(0.76)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.46	(18.69)
Net income/(loss)	[1]	(0.19)	(19.45)
Net asset value	[1],[2]	$ 107.99	$ 113.28
Net investment income/(loss)		(2.58%)	(2.46%)
Expenses before incentive fees	[3],[4]	2.58%	2.46%
Expenses after incentive fees	[3],[4]	2.58%	2.46%
Total return before incentive fee	[5]	(0.18%)	(14.65%)
Total return after incentive fees	[5]	(0.18%)	(14.65%)
Frontier Select Fund [Member] | Class 1AP [Member]
Net asset value		$ 82.48	$ 100.02
Interest income	[1]	0.00	0.00
Expenses	[1]	(0.49)	(0.57)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.31	(14.09)
Net income/(loss)	[1]	(0.18)	(14.66)
Net asset value	[1],[2]	$ 82.30	$ 85.36
Net investment income/(loss)		(2.58%)	(2.46%)
Expenses before incentive fees	[3],[4]	2.58%	2.46%
Expenses after incentive fees	[3],[4]	2.58%	2.46%
Total return before incentive fee	[5]	(0.22%)	(14.66%)
Total return after incentive fees	[5]	(0.22%)	(14.66%)
Frontier Global Fund [Member] | Class 1 [Member]
Net asset value		$ 131.57
Interest income	[1]	0.00
Expenses	[1]	(2.19)
Net gain/(loss) on investments, net of non-controlling interests	[1]	6.95
Net income/(loss)	[1]	4.76
Net asset value	[1],[2]	$ 136.33
Net investment income/(loss)		(6.91%)
Expenses before incentive fees	[3],[4]	6.91%
Expenses after incentive fees	[3],[4]	6.91%
Total return before incentive fee	[5]	3.62%
Total return after incentive fees	[5]	3.62%
Frontier Global Fund [Member] | Class 2 [Member]
Net asset value		$ 187.17
Interest income	[1]	0.00
Expenses	[1]	(1.77)
Net gain/(loss) on investments, net of non-controlling interests	[1]	10.08
Net income/(loss)	[1]	8.31
Net asset value	[1],[2]	$ 195.48
Net investment income/(loss)		(3.91%)
Expenses before incentive fees	[3],[4]	3.91%
Expenses after incentive fees	[3],[4]	3.91%
Total return before incentive fee	[5]	4.44%
Total return after incentive fees	[5]	4.44%
Frontier Global Fund [Member] | Class 1AP [Member]
Net asset value		$ 149.92
Interest income	[1]	0.00
Expenses	[1]	(1.42)
Net gain/(loss) on investments, net of non-controlling interests	[1]	8.00
Net income/(loss)	[1]	6.58
Net asset value	[1],[2]	$ 156.50
Net investment income/(loss)		(3.91%)
Expenses before incentive fees	[3],[4]	3.91%
Expenses after incentive fees	[3],[4]	3.91%
Total return before incentive fee	[5]	4.39%
Total return after incentive fees	[5]	4.39%
Frontier Heritage Fund [Member] | Class 1 [Member]
Net asset value		$ 99.83	$ 121.19
Interest income	[1]	0.00	0.00
Expenses	[1]	(1.54)	(2.46)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.39	(14.23)
Net income/(loss)	[1]	(0.15)	(16.69)
Net asset value	[1],[2]	$ 99.68	$ 104.50
Net investment income/(loss)		(6.63%)	(8.51%)
Expenses before incentive fees	[3],[4]	6.63%	8.49%
Expenses after incentive fees	[3],[4]	6.63%	8.51%
Total return before incentive fee	[5]	(0.15%)	(13.75%)
Total return after incentive fees	[5]	(0.15%)	(13.77%)
Frontier Heritage Fund [Member] | Class 2 [Member]
Net asset value		$ 152.53	$ 179.70
Interest income	[1]	0.00	0.00
Expenses	[1]	(1.30)	(2.38)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.23	(21.21)
Net income/(loss)	[1]	0.93	(23.59)
Net asset value	[1],[2]	$ 153.46	$ 156.11
Net investment income/(loss)		(3.63%)	(5.52%)
Expenses before incentive fees	[3],[4]	3.63%	5.50%
Expenses after incentive fees	[3],[4]	3.63%	5.52%
Total return before incentive fee	[5]	0.61%	(13.10%)
Total return after incentive fees	[5]	0.61%	(13.13%)
Frontier Heritage Fund [Member] | Class 1AP [Member]
Net asset value		$ 111.78	$ 134.28
Interest income	[1]	0.00	0.00
Expenses	[1]	(0.97)	(1.78)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.63	(15.86)
Net income/(loss)	[1]	0.66	(17.64)
Net asset value	[1],[2]	$ 112.44	$ 116.64
Net investment income/(loss)		(3.63%)	(5.52%)
Expenses before incentive fees	[3],[4]	3.63%	5.50%
Expenses after incentive fees	[3],[4]	3.63%	5.52%
Total return before incentive fee	[5]	0.59%	(13.11%)
Total return after incentive fees	[5]	0.59%	(13.14%)
Winton Fund [Member] | Class 1 [Member]
Net asset value			$ 159.08
Interest income	[1]		0.00
Expenses	[1]		(3.45)
Net gain/(loss) on investments, net of non-controlling interests	[1]		(11.03)
Net income/(loss)	[1]		(14.48)
Net asset value	[1],[2]		$ 144.60
Net investment income/(loss)			(8.98%)
Expenses before incentive fees	[3],[4]		8.98%
Expenses after incentive fees	[3],[4]		8.98%
Total return before incentive fee	[5]		(9.10%)
Total return after incentive fees	[5]		(9.10%)
Winton Fund [Member] | Class 2 [Member]
Net asset value			$ 216.50
Interest income	[1]		0.00
Expenses	[1]		(3.24)
Net gain/(loss) on investments, net of non-controlling interests	[1]		(16.50)
Net income/(loss)	[1]		(19.74)
Net asset value	[1],[2]		$ 196.76
Net investment income/(loss)			(5.98%)
Expenses before incentive fees	[3],[4]		5.98%
Expenses after incentive fees	[3],[4]		5.98%
Total return before incentive fee	[5]		(9.12%)
Total return after incentive fees	[5]		(9.12%)
Winton Fund [Member] | Class 1AP [Member]
Net asset value			$ 176.44
Interest income	[1]		0.00
Expenses	[1]		(2.55)
Net gain/(loss) on investments, net of non-controlling interests	[1]		(12.28)
Net income/(loss)	[1]		(14.83)
Net asset value	[1],[2]		$ 161.61
Net investment income/(loss)			(5.98%)
Expenses before incentive fees	[3],[4]		5.98%
Expenses after incentive fees	[3],[4]		5.98%
Total return before incentive fee	[5]		(8.41%)
Total return after incentive fees	[5]		(8.41%)

[1] Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.

[2] See Note 4 to the Financial Statements.

[3] Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.

[4] Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.

[5] Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner's total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

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Financial Highlights (Frontier Funds) (Details) - Frontier Fund [Member]		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Ratios to average net assets
Net investment income/(loss)	[1]	(5.42%)	(5.99%)
Expenses before incentive fees	[2],[3]	5.69%	6.08%
Expenses after incentive fees	[2],[3]	5.69%	6.22%
Total return before incentive fees	[4]	(1.61%)	(9.55%)
Total return after incentive fees	[4]	(1.61%)	(9.69%)

[1] Annualized with the exception of incentive fees.

[2] Does not include management and incentive fees at Galaxy Plus.

[3] Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5.

[4] Total returns are not annualized.

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Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - Number	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Numbers of Instruments Bought	251	1,348
Derivative Numbers of Instruments Sold	306	1,217

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Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - USD ($)		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Realized trading income/(loss)		$ 2,453,394	$ (2,416,208)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	4,526	(25,672)
Agriculturals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(45,090)	28,070
Currencies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(118,064)	17,651
Energies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(29,682)	48,325
Interest rates [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	235,633	(86,844)
Metals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(4,975)	(59,526)
Stock indices [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	$ (33,296)	$ 26,652

[1] Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures, forwards, and options.

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Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - Frontier Balanced Fund [Member] - USD ($)		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Change in unrealized trading income/(loss)		$ (2,249,646)	$ (1,287,006)
Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(102,236)	110,265
Agriculturals [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(24,291)	41,234
Currencies [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(73,863)	(41,931)
Energies [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	8,770	(44,022)
Interest rates [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	(7,691)	148,669
Metals [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	2,411	13,694
Stock indices [Member] | Unrealized Trading Revenue from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	$ (7,572)	$ (7,379)

[1] Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).

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Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 3) - The Series of the Frontier Funds [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member] | Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 307,042	$ 348,879
Gross Amounts offset in the Statements of Financial	(163,216)	(128,220)
Net Amounts Presented in the Statements of Financial Condition	143,826	220,659
Frontier Balanced Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	10,599,721	10,794,908
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	10,599,721	10,794,908
Frontier Diversified Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	5,833,765	5,920,414
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	5,833,765	5,920,414
Frontier Long/Short Commodity Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	461,666	479,102
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	461,666	479,102
Frontier Heritage Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	2,905,249	2,955,444
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 2,905,249	$ 2,955,444

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Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member]	Mar. 31, 2019
Maximum [Member]
Derivative Instruments and Hedging Activities (Series of Frontier Funds) (Textual)
Percentage of embedded management fees	1.50%
Percentage of fair value of swaps and embedded incentive fees	25.00%
Minimum [Member]
Derivative Instruments and Hedging Activities (Series of Frontier Funds) (Textual)
Percentage of embedded management fees	1.00%
Percentage of fair value of swaps and embedded incentive fees	15.00%

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Derivative Instruments and Hedging Activities (Frontier Funds) (Details) - Frontier Fund [Member] - USD ($)		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Realized trading income/(loss)		$ 5,144,906	$ (5,179,780)
Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)	[1]	(1,277,349)	(754,752)
Agriculturals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(59,562)	(164,058)
Currencies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(500,661)	(333,820)
Energies [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(584,896)	(258,495)
Interest rates [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		552,670	(178,994)
Metals [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		(617,340)	175,869
Stock indices [Member] | Realized Trading Revenue from Futures, Forwards and Options [Member]
Realized trading income/(loss)		$ (67,560)	$ 4,746

[1] Amounts recorded in the Consolidated Statements of Operations under Net realized gain(loss) on futures forwards and options.

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Derivative Instruments and Hedging Activities (Frontier Funds) (Details 1) - Frontier Fund [Member] - USD ($)		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Change in unrealized trading income/(loss)		$ (3,663,800)	$ (2,252,693)
Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)	[1]	525,552	(763,918)
Agriculturals [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		(79,579)	42,190
Currencies [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		87,240	(270,575)
Energies [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		221,050	30,389
Interest rates [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		(234,353)	312,483
Metals [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		484,455	(589,655)
Stock indices [Member] | Net Change in Open Trade Equity from Futures, Forwards and Options [Member]
Change in unrealized trading income/(loss)		$ 46,739	$ (288,750)

[1] Amounts recorded in the Consolidated Statements of Operations under Net change in open trade equity/(deficit)

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Derivative Instruments and Hedging Activities (Frontier Funds) (Details 2) - Frontier Fund [Member] - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 427,769	$ 3,244,057
Gross Amounts offset in the Statements of Financial	(291,793)	(3,642,246)
Net Amounts Presented in the Statements of Financial Condition	135,976	(398,189)
Swap [Member]
Gross Amounts of recognized Derivative Assets	19,800,401	20,149,868
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 19,800,401	$ 20,149,868

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Derivative Instruments and Hedging Activities (Frontier Funds) (Details Textual) - Frontier Fund [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Monthly average of forwards, options and futures contracts bought	$ 274	$ 322
Monthly average of forwards, options and futures contracts sold	$ 1,348	$ 8,519

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Trading Activities and Related Risks (The Series of the Frontier Funds) (Details)	3 Months Ended
	Mar. 31, 2019
The Series of the Frontier Funds [Member]
Trading Activities and Related Risks (Textual)
Trading activities and related risks ,description	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor?s portfolio. It is anticipated that any Trading Advisor?s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

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Trading Activities and Related Risks (Frontier Funds) (Details)	3 Months Ended
	Mar. 31, 2019
Frontier Fund [Member]
Trading Activities and Related Risks (Frontier Funds) (Textual)
Description of trading activities and related risks	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor's portfolio. It is anticipated that any Trading Advisor's margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

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Subsequent Events (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member]	3 Months Ended
	Jun. 24, 2019 USD ($)
Frontier Balanced Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 3,330,936
Frontier Diversified Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	1,038,567
Frontier Heritage Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	710,961
Frontier Long/Short Commodity Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	127,007
Frontier Masters Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	1,520,995
Frontier Select Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	249,842
Frontier Global Fund [Member]
Subsequent Events (The Series of the Frontier Funds) (Textual)
Paid in redemptions	$ 1,766,684

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Subsequent Events (Frontier Funds) (Details)	3 Months Ended
	Jun. 24, 2019 USD ($)
The Trust [Member] | Frontier Funds [Member]
Subsequent Events (Frontier Funds) (Textual)
Paid in redemptions	$ 8,744,982