Plot line of Lowest Low of 20 day in intraday chart

[Bügeleisen]

Hi,
i am looking for a study to plot a line of the 20-day low in the intraday chart .
Condition: Only plot the line of the low, if the last intradyquote is in range(e.g. 5 %) of the 20-D-low.
Thx

[Bügeleisen]

I have tried another simular formular:
The predifined "prev2MonthHH LL[1]"

It uses the callfunction getmonthlyOHCL.efs
Perhaps it`s possible to change this callfunktion part to get the low e.g. 20 days?