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TRADING ACTIVITIES AND RELATED RISKS, Credit Risk (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Credit Risk [Abstract]    
Percentage of Net Asset Value required for margin and good faith deposits, low end 10.00%  
Percentage of Net Asset Value required for margin and good faith deposits, high end 30.00%  
Fair value of securities held to satisfy margin and good faith deposits $ 30,663,072 $ 54,020,003
Actual margin and good faith deposits as a percentage of Net Asset Value 16.00% 20.00%
Cash deposited with interbank market makers $ 11,033,052 $ 186,271
Actual cash deposited with interbank market makers as a percentage of Net Asset Value 6.00% 0.00%
Restricted cash for margin requirements $ 4,424,114 $ 409,892
Restricted cash for margin requirements as a percentage of Net Asset Value 2.00% 0.00%
Maximum margin-to-equity ratio 30.00%