Market Matched Amount

Is there a selection variable that returns:
Total amount of matched money on a market
Total amount of money matched on a particular selection

I have looks all aver the help files but cant see what I am looking for.
Thanks

Hi
amount matched in a market is: market_volume
selection's volume percentage is: volume
amount matched on a selection is: market_volume*volume/100

thanks a million Mark

Market Matched Amount

Hello Guest