Commodities Held by Broker - Schedule of Realized and Unrealized Gains and Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Commodities Held By Broker
Gross realized gains	$ 323,196	$ 681,200	$ 1,050,844	$ 1,247,113
Gross realized losses	(1,129,690)	(23,379)	(1,630,591)	(924,507)
Unrealized (loss) gain	1,379,165	(97,521)	643,834	591,566
Total	$ 572,671	$ 560,300	$ 64,087	$ 914,172