The Commodities ETF (DBC) began and ended on Tuesday at the apex of and in between trendline resistance and support, as shown on the Daily chart below...an important one to watch today and thereafter!
An indication of weakness would likely be confirmed by a failure of AUD/USD to regain and hold above 1.05, along with further weakness in China's Shanghai Index, as discussed in my posts of August 19th and August 15th.
AUD/USD" title="DBC & AUD/USD" width="1268" height="964">