I use a variety of ratings as inputs to machine learning models.

I have many comments asking how I do the class ratings for what is being posted in the horse racing section of this forum.

This is the details around that particular rating which is fairly powerful in finding the winner.

I go through calculating and how to make it better in the video on youtube.

https://youtu.be/qarC_1M4SZM

I do hope people learn something profitable from it.