'A' a long signal
The commercials are at a maximum long position (longest in three years). A long signal occurred on May 21, 2013, soon after the previous bullish trend was broken. Holding this long position until the trend ended on November 5, 2013, would have yielded a gain of $6,492 per contract.
'B' a short signal
The commericals are at an extreme short position and the commercials' activity in the last six weeks has accelerated to an extremely high level (almost 80% in the green line at the bottom). Right after the bullish trend ended, there was a long entry signal on April 2, 2014. Holding that position until the bearish trend ended on August 26, 2014 would have yielded a gain of $9,240 per contract.