I too have seen the betfair site and there is an Indian guy who is using and selling his system. This method still requires you to accurately identify false favourites, but there is merit in it. I used to do something "similar" at the greyhounds but the margins were too small to warrant the investment. My little system was not the same, but based on the same theory. I used to ring my bookie who offered greyhound odds and check what was going on in the ring at the track. Sometimes I could lay off my bets either way and get a profit.
He no longer offers odds on greyhounds!
:lol:

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Treat your selection and staking methods not with optimism, nor with pessimism, but with realism.