The previous swing low acts as a strong support level because it represents a price area where buying pressure previously overcame selling pressure, causing the market to reverse upward. When the price revisits this level again, many traders expect similar behavior — buyers step in with confidence, anticipating a bounce. This happens because market participants remember that zone as a point of value or demand. Additionally, stop-loss orders and fresh buy entries often cluster around previous swing lows, increasing liquidity and making it a key level for price reactions. Thus, the previous swing low becomes an important psychological and technical support zone in any chart.