Very good question Crackone,

I can only vouch for my ratings-handicapping, I think the same would be valid for all handicapping, and I'd say it is at least 95% accurate.

Don't know about systems though, don't use any, I think it would have to be far less than this simply by the very rigid nature of them.

With handicapping you are using dynamic data applicable to today's
race, with systems there is only past data that fits a horse, and may not have anything to do with today's race conditions.

I'm guessing of course re. system accuracy.

Good luck