Market support on a selection

Hi,

How can I use MF to find the market support for a selection? For example in horse racing before the off, a selections price is going in one direction for the last 1 minute whilst constantly being backed or layed with most of the market money. I don't want to just compare now figures to figures 1 minute ago (someone could have just backed £20,000 in the last 1 second). I would like to know that out of the last minute this selection has always (mostly) had the most amount of money matched every 5 seconds and the price is on a trajectory up or down (give or take a few ticks).

Thanks!

Hi
Try something like this in test mode:

selections trigger expression voldif_1 is the maximum
and selections back price dif over 1 min is less than 0   <---------- back this 
or
selections trigger expression voldif_1 is the maximum
and selections back price dif over 1 min is greater than 0   <---------- lay this

the voldif_ and price dif conditions are updated on each refresh so it will take into account all money matched during the last minute