G'day Maverick and Topsy.
I was actually referring to the ratings given to Air Cooled and El Man Goss after the race, compared to the ratings given to Dance of Ascot and Lady Larissa in a C1 on the same day.
This was merely to point out an apparent anomaly for any one who uses the Ozeform ratings.
They seem to be base ratings based on overall time, compared to time on the day.
Osull DJ once informed me that these ratings are not the ones used for the Read ratings that appear around some Pub Tab venues.
Brave Chief hit the nail on the head with his last line.
You have to gauge the ability of a horse for today's race by looking at a string of past ratings.