'A' a short signal
The commercials are near a maximum short position (lowest in three years) and their acceleration of trading activity over the previous six weeks is extremely high (above 80% in the green line at the botton). A short signal on May 9, 2014, just as the previous bullish trend was broken and holding the short position until this trend ended on April 3, 2015, would have yielded a gain of $13,865 per contract.
'B' a long signal
The commericals are at an extreme long position (longest in three years). Shortly after the bearish trend ended, there was a long entry signal on April 23, 2015. Holding this position until the bullish trend ended on May 19, 2015 would have yielded a gain of $1,635 per contract.