From Bet Angel forum:
Suggestion - wouldn’t it be better for the in-play traders to have the market traded volumes reset to zero before the off.
I would like to see a spreadsheet with this added and possibly be implemented as a future feature.
So you could even have the full traded column and the in-play traded column.
Using Bfexplorer Spreadsheet and bot script you can do it right now.
You can download the script here: InPlayTradedVolumeToSpreadsheet