Not only can you use a gann fan in the upward position to help identify targets above, but it can be used in a downward position to help identify areas of resistance and to help predict runs out of a downtrend. The vast majority of the time when a stock passes through the last fan angle there is a significant run. Additionally, the vast majority of the time, when price action is out of the shadow of the downward gann fan the downward trend is over and the equity is in the recovery and accumulation phase. I have made many many profitable trades using this technique