back and lay matched amounds

Hi
I would like to know if there is a way or a trigger to know the back and lay amounts matched on any player on any game on all rounds
F.i. hand 1 on poker has volume 30% meaning if total matched in channel are 1000  euros hand 1 matched in total 300 euros.
From 300 euros maybe 100 was at back side (price) and 200 at lay side (price)
How can i get this information from a trigger?

    

I double checked the functions that the Games API offers, and unfortunately you can't find out how much was matched on each side. Sorry about that. BetFair just does not provide this information.

You can get the total matched volume for each selection, through the "volume" variable, but not back or lay separately.

BTW, I don't think a poll is appropriate in this case.