Denise,
If your figures are based on form or stats, I can run these parameters fairly quickly for you, but if they are based on neurals or ratings, then I'd suggest testing forward for a lot longer timeframe.
Things can turn very quickly.
I have some systems that have done well over 1,000 plus bets, but fell in a hole over the next thousand.
It shows you that you need a big chunk of data for big confidence
All the same the figures look excellent.
If you want help in confidence, drop me a line.
I'm sure other members can attest to the fact that anything shared with me remains your property in strictest confidence.
racestats at hotmail dot com