'A' a short signal
The commercials are very short and they have hugely accelerated their buying during the previous six weeks (the green line at the botton). The first step after receiving the signal at 'A' is to wait for the moderate bullish trend line to be broken. That happened on April 17, 2013. Holding a short position until the bearish trend was broken on July 16, 2013, would have resulted in a $9,850 gain per contract.
'B' a long signal
The commericals are very long but there has been relatively little acceleration of buying in the last six weeks (the green line at the bottom). The first step is to wait for the bearish trend to be broken. That occurred on September 4, 2013. Holding a long position until the bullish trend was broken on October 29, 2013, would have resulted in a $3,380 gain per contract.