Quote:
Originally Posted by davew
They jump around because some people play the moves. Say early in betting you can back at 3.00 for $10 and during betting can lay at 2.00 for $10 they have made $10. A great exercise for people who like to dutch and/or know there will be late money on a favorite that has not showed up on the exchange yet.
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That's common with Betfair; it's known as 'arbitrage,' a lot of people are into it, and there are bots that scour the Betfair markets 24/7 looking for such advantages. It's especially popular with the Brits in the U.K. races.
