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Statements of Cash Flows
 12 Months Ended
Oct. 31, 2018
USD ($)
Oct. 31, 2017
USD ($)
Oct. 31, 2016
USD ($)
Cash flows from operating activities      
Cash received for accrued income $ 0 $ 0 $ 0
Cash paid for expenses (696,256) (591,577) (832,636)
Net cash used in operating activities (696,256) (591,577) (832,636)
Cash flows from financing activities      
Cash received to purchase redeemable Shares 112,839,783 283,768,433 443,142,449
Cash paid to redeem redeemable Shares (99,745,024) (270,838,173) (477,929,067)
Net cash provided by/(used in) financing activities 13,094,759 12,930,260 (34,786,618)
Adjustment to period cash flows due to currency movement 519,315 (8,462,494) 17,286,580
Increase/(Decrease) in cash 12,917,818 3,876,189 (18,332,674)
Cash at beginning of year 114,156,875 110,280,686 128,613,360
Cash at end of year 127,074,693 114,156,875 110,280,686
Reconciliation of net comprehensive loss to net cash used in operating activities      
Net Comprehensive Loss (704,433) (592,192) (826,488)
Adjustments to reconcile net comprehensive loss to net cash used in operating activities:      
Effect of exchange rate on cash 1,425 3,756 (11,238)
Accrued Sponsor's fee 43,161 37,756 40,116
Accrued interest expense on currency deposits 10,943 9,596 10,377
Prior period accrued Sponsor's fee (37,756) (40,116) (45,403)
Prior period accrued interest expense on currency deposits (9,596) (10,377)  
Net cash used in operating activities $ (696,256) $ (591,577) $ (832,636)