There is a clear correction taking place throughout the market. FB is no different. On the daily chart MACD is in a sale and momentum is down. As well, the Heikin-Ashi candles are showing a clear downward trend. It appears that FB may be at a level of support. IF it pushes through this level of support look to short. Otherwise, it may come back up near the 20 SMA. IF, it does this and doesn't push through the 20, look for that as an entry to short.