Custom column in trades section

I would like to add a custom column in Trades section. It would be Return/Holding_period(days). Is it possible? Cannot find a way to do that. Only way I found is to export and add in excel sheet but that is too cumbersome to do frequently.

In PP Version: 0.54.2 (Jul. 2021) you can only add the columns that appear under the gear icon.

Of course, if you can code there are more possibilities. I noticed Python script to convert exported portfolio into Yahoo-Finance format. by DirkBalthasar · Pull Request #1199 · buchen/portfolio · GitHub and I wouldn’t expect it to be too hard to push into openpyxl.