I would like an indicator that I can use in a strategy backtest for the o/n H and Low.

Indicator giving H and Low for Es overnight session (best if I can set the start and end times for the on in the indicator). I will be making a trade in the RTH based on On High and low values.

What I have already tried:
V38anapivots by FT which shows it on a multi-session chart but does not have a way to work without a multisession


So if the strategy contains:
"sell in the RTH if the price is > the overnight high"

I want an indicator I can reference for o/n high
IN THE STRATEGY NOT TO PLOT ON A MUTLI-SESSION CHART

one session slot