After testing the ratings for 9 months for sky I found the only edge to be made was to categorise the races into Class / Venue / Distance and Field Sizes.

Not just looking at the overall top rated horse but the different variables on offer from the DFS Form. With ratings on DFS, Recent, Time, Best, Distance, Class and Overall there is many options available.

Just takes a long time to collect the data and I didn't know how to automatically do the process.