Commodities Held by Broker - Schedule of Commodities Held by Broker (Details) - USD ($)	Jul. 31, 2018	Oct. 31, 2017
Commodities Held By Broker
Option Contracts	$ 56,768	$ 166,945
Future Contracts	(584,805)	(377,807)
Total Commodities	$ (528,038)	$ (210,862)

The fair value of the open option contracts written for the investment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Name:	us-gaap_OpenOptionContractsWrittenAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant