Previous Day high and low crossing alert

This indicator plots the Previous Day's High and Low on the chart and gives alerts when the current price crosses above the previous high or below the previous low. It:

Detects new sessions by checking time gaps between candles.

Tracks today's high/low and stores them at session close.

Plots previous day's high (green) and low (red).

Triggers alerts using if and alertcondition when price crosses those levels.