'A' a short signal
The commercials are near a maximum short position (longest in three years) and their acceleration of trading activity over the previous six weeks is very high (approximately 50% in the green line at the botton). Entering short on October 18, 2012, soon after the previous bullish trend was broken and holding that position until this bearish trend ended on November 19, 2012, would have yielded a gain of $40,850 per contract.
'B' a long signal
The commericals are at a maximum long position and the commercials' activity in the last six weeks has accelerated to a high level (almost 40% in the green line at the bottom). Shortly after the bearish trend ended, there was a long entry on February 10, 2015. Holding that position until the bullish trend ended on July 31, 2014 would have yielded a gain of $53,650 per contract.