Also, besides being oversold on virutally every technical indicator, the price is far away from its 4day ma which is currently at $44.99 (it will be lower tomorrow morning - probably around $43.70). So if there is any hope for a near-term rebound the price should move towards the 4day ma.
As for volume, it is of concern but let's face it - these days around 70-80% of the trading is done by computers and shorting is becoming more and more popular. Since $47 price range couldn't hold, it was a signal to sell/short. The gap is now filled and we'll see what tomorrow brings.