FB has retreated close to 10% within 2 days amid its Data Leak scandal and seems not ending on the selling. However, taking a rational look at the stock's technical, the stock has traded steeply out of the lower bollinger band with climactic volume observed. These observations coupled with a long-legged candle could suggest that selling has been may be over done and we may see a short term rebound.
Above analysis is negated if price falls below the low of the long legged candle.