Traders and investors prefer an entry when oversold stock prices are hovering at low prices. There are different reasons a trade may or may not be a good idea. But as a general rule, buying the dip is an attempt to capture a stock that you want to own at a temporarily lower price, with the idea the stock will go up over time based on its past performance. Bottom Fishing is based on the same idea, except you are looking for stocks that are so low that they theoretically have nowhere to go but up. Bottom fishing is a riskier venture as some stocks may have dropped to lower lows for a reason.