Swing Low is a term used in technical analysis that refers to the troughs reached by a security's price or an indicator. A swing low is created when a low is lower than any other surrounding prices. Successively lower swing lows indicate that the underlying security is in a downtrend, while higher lows signal an uptrend. A swing low's opposite counterpart is a swing high.
Swing low can be effectively used when the lowest low ends up as a reversal bar. A high percentage of the time, prices will continue to have upward momentum following a swing low reversal bar.