'A' a long signal
The commercials are very long and have accelerated their buying during the previous six weeks (near 30% in the green line at the botton). After the "A" signal, the first thing to do was wait for the three-week bearish trend to end. This happened on July 17, 2013. Holding a long position until the bullish trend was broken on May 28, 2014, would have resulted in a gain of $9,893 per contract.
'B' a short signal
The commericals are very short and there is a huge acceleration of buying (70% in the green line at the bottom). The green line works as a trigger; it doesn't change the meaning of the signal - in this case hugely short. Upon receiving the signal at "B", the first step is to wait for the bullish trend to be broken. This happened on July 16, 2014. A short position held until the bearish trend line was broken on February 5, 2015, would have resulted in a gain of $11,112 per contract.