ROC (Rate of Change)
The Rate of Change is an oscillator that indicates the change in price between “today” and the price x periods ago. So the 10-day ROC is the percentage change in price between today's closing price and the closing price 10 days ago.
The ROC is generally used as a short-term overbought or oversold indicator. The higher the ROC goes, the more overbought the underlying is and the more likely a pullback will occur. The lower the ROC goes, the more oversold the underlying stock is, and a bounce is due.
But like many other indicators one needs to do his/her homework to determine historically what ROC values are typically high or low for a particular stock.