yes, it's true that the margin is thin, as i mentioned the way to make money is called scalping. back at higher odds and lay at lower. there is a software that i was playing with few months back, it's better than the common one. it allows you to connect to betfair and betdaq simultaneously, so even before the game or race start, you can already make money from them, so the term arbitrage. btw, i don't believe in paying for the software though the advantage is you are buying to view the faster ticks to your advantage. but i have seen some crooks offering odds that make you think that there is surprise in an outcome of an event, especially in horse racing. speaking from experience, this sprts trading thing is only for making beer money. i have a friend who also subscribe to the software and made tens of thousands years ago. eventually, all went back.