Commodities Held by Broker (Details Narrative)	9 Months Ended	12 Months Ended
	Jul. 31, 2017 GBP (£)	Oct. 31, 2016 GBP (£)	Jul. 31, 2017 Integer $ / shares	Oct. 31, 2016 Integer $ / shares
Number of futures contracts | Integer			116	22
Pounds [Member]
Purchase of futures contracts | £	£ 4,350,000	£ 825,000
Futures contracts weighted average price			$ 1.27	$ 1.45
Fair market value of futures contract			$ 1.39	$ 1.64
Minimum [Member]
Futures contracts term	3 months	3 months
Maximum [Member]
Futures contracts term	4 months	4 months