I found this description of oversold and it's as g
Post# of 75003
OVERSOLD
Let's assume that you think that a stock is "worth" $20 per share. A massive wave of selling in the stock takes place due to some poor earnings results. The stock, which was once trading at $45, plummets to just $10. It seems like everyone is exiting the stock at the same time.
You decide that the stock is now "oversold" - this would mean that the selling pressure has taken the stock below the price that you think the stock is worth. If you think that the stock is worth $20, and it is now trading at $10, then you would be of the opinion that the stock is now oversold.
Hope this helps..