I need some software that can calculate live (either in realtime or at each minute's update) the percent overlay/underlay of all horses in each race in all tracks in the U.S.; if it could sort by low to high odds both Morning Line and Post Time that would be a plus (to reflect whether a horse had changed position with respect to low-to-high odds standing, either going lower in position, staying the same or going higher with respect to other horses in the field), much like certain stock trading accounts have software that shows price percent change stock rankings.I could do all this with Excel but as my system is based on making dozens of very small bets per day, that is not an option, as there is not enough time to manually process each bet due to the changes that occur each minute and the number of possible simultaneous bets at various tracks which would tend to split my attention.

your best bet is to sign up for winticket.com which is free. (state restrictions do apply however) and they have something called TOOLS - PERCENTAGES where it breaks down everything by percent, and the tools give you the true odds for each horse before and after scratches. it was worked quite well for me, and they have every track in the us and canada so you wont miss out on any action, great for last minute investing and who to toss out for the pick3 and pick4 plays.

Here is a good software on the subject http://xrl.us/sure2profit