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Summary of Significant Accounting Policies - Schedule of Commodities Held by Broker (Details) - USD ($) | Oct. 31, 2017 | Oct. 31, 2016
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Accounting Policies [Abstract] |  |
Option Contracts | $ 166,945 | $ (83,753)
Future Contracts | (377,807) | 218,475
Total Commodities | $ (210,862) | $ 134,722

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- Definition Future Contracts. + References No definition available. + Details
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- Definition The fair value of the open option contracts written for the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B.4,Column E) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611197-123010 + Details
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