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Commodities Held by Broker - Schedule of Realized and Unrealized Gains and Losses (Details) - USD ($)
3 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Commodities Held By Broker    
Gross realized gains $ 130,946 $ 405,258
Gross realized losses (413,335) (460,018)
Unrealized gain 115,868 38,949
Total $ (166,521) $ (15,811)