Trading is one of the best and most unique things about betting exchanges like Betfair. Trading is having more than one bet in a market; seeking to improve your position or lock in a profit on all possible outcomes.

If for example you have layed a selection first, and then backed the same selection soon after at a higher price, you are guaranteeing yourself a profit whichever result occurs. This is what most customers call a Green Book because all possible outcomes show a profit. On top of that, your liability is now zero, meaning there is no risk

When trading, you want to lay at a low price and back at a higher price. Think of it like buying a house at one price, then selling it later at a higher price. Live sport is perfect for trading, this is why many events at betting exchanges like Betfair match far more bets in-play than before the event began.