Unilife Corp. shares are also overbought, though in a slightly different way. The stock's up 22% in the past two days alone, which is nice for current owners, but just not apt to last once the profit-takers dig in. When you take a step back and look at a weekly chart of UNIS though, you can see that the last two days have finalized a much bigger rebound effort out of a long-standing downtrend that became an uptrend at the beginning of this year. In other words, it's a "buy on the dip" situation.