Give it 3 starts or a month which ever comes first, i find that if they win at the first start i Back them the next 2 starts or balance of the month . I have a program which was made for me and they actually go off the recent data section after a month but stay in my data base.My data base curently would have close to a 1000 horses in it.
I will if any interest post a few tips off the system on this site so people can check them out.
cheers