Chrome, Mmmmmm, a very good point there that I hadn't factored in. Acumen will give fixed odds early on but didn't mention anything about penalties.

As far as the pro goes ...... reminds me of a bloke called John Gogh in the UK a few years back (a well known pro) he used to employ that tactic, he was well known by the public at the track (especially York) and would manipulate prices like that very successfully, (though it didn't always work of course) I remember they banned him from betting on the Tote cos he would have 50,000 for a place red hot favs...like 10-1 ON etc , as the tote had a minimum payout (in those days) of 11p (10p stake)