Grasscutter - Tabcorp does provide this info on their website (it is the only TAB that does) but I have my own database with all the results, TAB prices, etc in it. I have a program which gets the info off the various TAB websites. Only problem is when one of the sites decides to stop working like the NSW site has done today :sad:

Personally I feel that whether it is firming or drifting is not that important - you need to look at the value of the horse as close to the start as possible - not worry about what it was 15 minutes ago!