Merit in this approach-horse has to have had a reasonable number of starts- hard to apply to 3y-o-s. Also need to consider prizemoney in conjunction with this figure and the class of race in which the horse wins compared to the class of horse it is racing against. A very consistent bush galloper may have difficulty against a less consistent group or w.fa. performer. Nonetheless if the horses are roughly of the same class your ratio does separate winners from professional placegetters that just don't seem to win.