Vortech I would be very surprised if any ratings system was accurate enough to have the $5 chances win 20% of the time etc because as Chrome Prince has pointed out that ratings are based off information we know whereas the price fluctuations are based on information we don't know (basically) which is why a horse might firm or drift late in the betting.

As far as overs winning 10% and unders winning 30% of the time and evening out to 20% it isn't really that simple but in the testing I have done so far with the prices I use the unders have a better strike rate at the pointy end of the market.

Cheers,

Mat.