Previous Day Low (PDL)

The previous day low is the low of the prior session you defined. Holding above it means today has not broken yesterday's worst price. Breaking it means today has accepted a lower extreme. Intraday traders use it as the mirror of PDH.

Mark it before the open from the same session definition as PDH. Both lines come from one candle. Mixing sources breaks the pair.

A sweep under PDL that reclaims the level is a classic intraday trap long. The stop is under the sweep, and the trade is about the failure, not about PDL as sacred support.

Acceptance below PDL is the intraday breakdown version. A retest from below that fails is the patient short. Risk goes back above PDL.

Buying PDL in a trend day that is already a one-way auction lower. Yesterday's low is not a reason for the auction to stop.

On a gap day, price may never trade near PDL. The level can be irrelevant for hours. Do not drag a target to it if the day has accepted a different area.