Thanks CP, one year was a little inconclusive.

I re-run the Saturday Metro results and get very similar results to yours over my data.

It is interesting that the starting price rating is irrelevant in the strike rate of a horse winning long-term.

Basically the price is the factor and a horse can be ranked 1, 2, 3 or 4 in starting price rankings and yet the strike rate per win stays the same.