Another observation I have made is if you look at the pre post market, as per the Telegraph say, and think I'll program the bot to react to a particular price range for the pre post fav and I can leave to let the bot do it's work, you're probably 40% wrong as the pre post doesn't even start favourite! Some other horse starts favourite because the pros know who they think will win and take no notice of what the Telegraph says, they've got another agenda. Then the followers chase the leader and the tote price dives. Bingo you've got a winner. It only happens maybe 20% of the time where a horse is targeted this way. It's really a hunch or inkling on my part, other forumites can probably shed light.
RP