Mark,

When I first played around with your system I had lots of problems with the prediction of the final SP odds to get the right amounts put on the lays.

Well I've been playing around with that system of yours again and think I solved the problem I was facing with unable to predict the final SP price.

I have backtested it for the last 8 months and it made over 260 units profit in that time. All Countries were profitable where tested but most of the 60% of the profit comes from the US races.

Just letting you know and if your interested I can pass on how I fixed the prediction problem via email.

Thanks for the idea.