Interesting stuff Selectabet.
What do you make of Betdevil BTW? Have you got a subscription with them? Last time I used them, probably about 2 years ago, I think I had the top level subscription where you could put together your own systems for back testing. Then my work blocked gambling sites which was a fucker as it was where I used to do most of my "work"
Pretty sure I backtested a couple of over/under systems but it was hard to produce a long term profit from them.