I'm displaying a pcf in a pane and would like to determine the highest value for the past 250 days for all issues in a selected index or watch list.  The pcf is ((c-minc22)/minc22*100).  Many thanks.

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There isn't a way to create an Indicator Formula for this which is short and fast enough to be practical.

What you could do is use your formula in a Custom PCF Indicator (which is what it sounds like you are doing when you say you are displaying a PCF in a pane).

Then add Donchian Channels to the Custom PCF Indicator. Set the Period of the Donchian Channels to 250. If you want to include the current bar in the 250 bars, set the Offset to 0. If you want to exclude the current bar from the 250 bars, leave the Offset at 1.

You can then click on the Donchian Channels and select Add Column to WatchList to use the Chan Top - Latest Value as a WatchList Column and sort.

Sorting with Indicators (3:40)