Like all these ratings they run hot and cold. I made heaps Laying the Unitab 100 rated horse for the first 3 weeks of March, but now it's unbeatable in selecting winners. Similarly I Layed Skyforrm top tipped horses yesterday for a $443 nett profit but today -$254 loss. Again I Layed Skyform 100 rated horses yesterday for -$254 loss, but today $394 nett profit. All based on $100 liability.
That's the nature of horse racing, I suppose.
Cheers RP