Raw its pretty simple -

Form is /40 (last start: /8, last win: /8, 2nd last start: /8, 3rd last: /6, 4th last /4, 5th last /4 and 6th last /2

Jockey /8, Trainer /6, Barrier /6 (according to how the horse runs e.g. leads). This gives a rating /20

Course and Distance stats is an overall, personal rating /10

Fitness is /10 according to fitness patterns

then Best results oer 2000m is /5

then i give and overall opinion /5

Usually it is out of 100, but i have removed one part so it is out of 90

BTW i made a mistake with makybe and railings, they should be 76.5 and 74.5 respectively

it is really simple and no doubt not as thrrough or extensive as xpt's but it works for me