I'm not sure if it's the same one, but I looked at something like that years ago. I think that's the one that uses the morning line to come up with contenders, right?
As I recall one of the rules was to only use it on fields of 8 or more, so it will work (or not work!
) just as well at any track on any race with 8 or more entries.
I'll dig around my stuff tonight to see if I still have my research on that.