A tendency during market sell offs is to seek stocks that fall hard and look over sold. Investors think they have nabbed a bargain, but their perception of value is anchored by past share prices rather than company fundamentals. Inevitably, they destroy more wealth.
Another, often better, strategy is searching for stocks that hold their ground or even rise during share market corrections. The share-price strength tells you the smart money is reluctant to let go, even though they could take profits and rotate into fallen stocks.
Technical analysts, who favour momentum trading, use share-price charts to buy stocks that are in clear uptrends and sell those in downtrends. It almost seems too simple to buy rising stocks and sell falling ones, but momentum indicators can be effective.