Heavy institutional ownership on this one and looks like today there was close to a 1 million share buy around 9:15 AM. Probably an institution or somebody with some inside knowledge. I feel safe taking a swing here.
@fantasyste, volume is one of the best indicators a stock can have. In my opinion it is THE BEST indicator. Something that is trading on unusual volume is often getting ready for a move one way or another (if the move hasn't already happened).
But I also use other common trading tools such as RSI, MACD, SMA, as well as a quick DD search for fundamentals before I get myself into any trade.