Without going into too much detail on the specifics of equations etc, how do you go about doing your ratings mattio? Mine are highly correlated to form, class and fitness which largely takes into account the horses last 3 starts. I'm interested as to how others approach it, I think my biggest drawback is I don't have a database to work from.

Todays Plays:

Hamilton - Race 6

No.
5 Gold Bridian

Scone - Race 5

No.
3 Domuar Miss