Running Lines
 

Jim, I use Formulator data and can see every past performance for each horse. Most data providers only show the last 10 or 12 and I think every example I've seen here shows up to 10. My question is would it be foolish to try and go back farther than 10 and if not, do you think there is a reasonable cut off? Thanks!

Ten lines are good enough to evaluate a horse. More than that can
create confusion.

The Hat