As I have been pointing out on my chart of TSX INDEXES for Energy, Real Estate, Financial Services, Gold and the Bank of Canada Commodities in $CAD, that...
...the Thompson Reuters CRB chart embedded in the chart shows that global commodities measured in USD has been dropping since 2008, although recently since September (2018), there has been a near term rally in commodities... BUT
...since Oct 3, 2018, the Thomson Reuters/CoreCommodity CRB Index has been coiling down (MarketWatch.com).
On my Twitter Feed from @hks55 came their chart suggesting that the commodity super cycle is poised for another leg down due to China's slowdown in credit creation that had spurred the commodity boom as Kyle Bass illustrates in this comparison between Chinese credit creation and their GDP (the link includes the 41 second video).