Thanks Bhagwan - that is a thought. It looks as though it does need one extra element to moderate things. However because I am looking at every horse in every race, I would need to be able to access that element online.

If I could access the pre-post online it would be interesting to see how it fits in to the mix.

But early days and I did change my mind and logged the data again today.

I have decided to log to a week and then if a trend emerges in that data, test that trend for the remainder of the month.

Already it looks as if it would be a bumpy road so I agree that a stop loss would be needed.