If you don't know what a short squeeze is, that is where a stock starts to rise rapidly, and as the trend continues to escalate, the short sellers will likely want out. For example, say a stock rises 5% in one day, those with short positions may be forced to liquidate and cover their position by purchasing the stock. If enough short sellers buy back the stock, the price is pushed even higher.
My favorite in this screen is Compucredit Corp (CCRT) which is forming a nice base at recent highs which could really blast off in coming days above $3.28 (with +100 short ratio)
Bankatlantic (BBX) is another one that I'm going to watch, but a bit nervous about the huge gap up. The stock has an 87% short float, but if it can base around its current price and then breakout - I'd definitely jump in it.
16 Stocks Ready for the Short Squeeze.