Restrict your system to look for horses ranked 1st or lower, or in the top 2 ranks or a group of ranks etc.
Examples of valid Ratings Rank filters are:-
1 (This would restrict the system to look for the highest ranked horse, i.e. top rated)
>=5 (This would restrict the system to look for only horses ranked 5th or higher)
>=1 and <=2 (This would restrict the system to look for horses ranked 1st or 2nd)
You can also group ranks together to see how ratings perform in conjunction with each other,
i.e. Set HA Career Best Ratings Rank to 1 and MR Career Best Ratings Rank to 1 to see how horses ranked 1st on both ratings have performed. or you could set them both to >= 1 and <= 2 to see how horses ranked 1st or 2nd in both the ratings have performed.