Money waiting on market

[tootatoota]

Hi Guys,
I have been looking for a value of "money waiting" on the market?
i know there is a stored value of "The money available of the back and lay prices of a selection, is this counted in dollar values?
i could probably do a long sum of stored values and get the answer or?
Is this shown somewhwere in guardian ?
What i am looking to do is use the money waiting of my selection as a % of the money waiting for the market?
Any help would be great thanks
Toota