I want to be able to detect if today’s volume is the largest in the lifetime of a stock. How to do this. Currently, I manually set the lookback period to do screening. But I want it to be dynamic

indicator("Max Volume", overlay = true) lookback = input(1000, 'Lookback input') flag = (volume == ta.highest(volume, lookback)) plotchar(flag, location = location.abovebar, color = color.fuchsia, size = size.normal)