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Commodities Held by Broker (Details Narrative)
 3 Months Ended 12 Months Ended
Jan. 31, 2018
USD ($)
Integer
$ / shares
Jan. 31, 2018
GBP (£)
Oct. 31, 2017
GBP (£)
Oct. 31, 2017
Integer
$ / shares
Number of futures contracts | Integer 40     145
Options [Member]        
Number of futures contracts | Integer 140      
Purchase of futures contracts | £   £ 5,250,000    
Fair market value of futures contract $ 1.22      
Options fair market value | $ $ 105,000      
Pounds [Member]        
Purchase of futures contracts | £   £ 1,500,000 £ 5,437,500  
Futures contracts weighted average price $ 1.22     $ 1.31
Fair market value of futures contract $ 1.21     $ 1.25
Minimum [Member]        
Futures contracts term 3 months 3 months 3 months  
Maximum [Member]        
Futures contracts term 4 months 4 months 4 months