CP,

I have found it isn't too hard to come up with an approx rating for most of the races that is quite accurate. But it is as you and crash put it almost impossible to get a reliable figure on every horse in every race. There is usually one of two horses per race who's recent times have been affected dramatically by rail positions and the like.

But overall i think getting the order out and then elimating horses on some sound principles ( recent placings, class, jockey, etc ) you can come up with a short list which will be useful.

I have found that the order is usually around approx 70%-80% correct and it is really only 1 or 2 horses that jump more than 2 or 3 postions either way in the order.

Thanks