An exchange is not a bookmaker — it is a market you trade in
A sportsbook quotes you a price and takes the other side of your bet. An exchange does not: it matches your order against another customer and charges commission when you win. That single difference changes the price you see, who carries the risk, and what happens when a market is suspended. This site explains the mechanics, without naming any operator.
The shape of a market
Every exchange market is a queue of orders, not a published price list. On one side sit customers who want the outcome to happen — they back it. On the other side sit customers who want it not to happen — they lay it. Each order names a price and an amount of money. The exchange keeps them in a list, shows everyone the best prices currently available, and matches an incoming order against the resting orders that can fill it.
That is why an exchange price list has two columns and always will. There is no single number that is “the price” of an outcome: there is the best price at which you can back, the best price at which you can lay, and the gap between them. If you have only ever used a sportsbook, the two-column board is the first thing that looks unfamiliar.
Illustrative numbers only. The top row is the current best offer on each side; the rest are the orders waiting behind it. The money shown is the amount available at that price, not a promise that it stays there — resting orders can be matched or cancelled at any moment.
A trade only happens when a back price and a lay price meet. If the best available back price is 2.42 and the best available lay price is 2.44, anyone willing to trade at 2.43 is between the two and will not be filled until the market moves.
Three roles, one trade
It helps to separate three things that a sportsbook quietly does all at once: quoting, risking and settling. An exchange only does the third of those, which is why it looks so different.
- 01A customer offers a price
Someone places an order naming a price and an amount. It sits in the book until it is matched or cancelled.
Resting order - 02Someone takes the other side
Another customer accepts all or part of that order. The moment the two sides meet, the money on both sides is committed and the market records a matched bet.
Matched - 03The event resolves
The result is graded against the market definition the exchange published when the market opened — not against what you assumed it meant.
Settlement
Laying is not a separate product. It is the mirror image of backing: you are offering money at a price in the hope that the outcome does not happen. Read the next page before you lay anything, because the risk profile is not symmetrical.
Where the cost sits
A sportsbook charges you invisibly, by showing you a price lower than the fair one. An exchange charges you visibly, as commission on the net result of a market. Both costs are real; only one of them is printed on the screen.
Affiliate disclosure: every affiliate link on this page and in the header points to a partner sportsbook and is a sponsored link — we may be paid if you open an account through it, at no extra cost to you. It is not an exchange, it does not change anything described on this page, and it is never a recommendation. Nothing here is betting, investment, financial or legal advice, and no result is promised. 18+ only. Betting and exchange trading carry real risk of loss: never stake money you cannot afford to lose, never borrow to bet, and never stake more to recover a loss. If gambling is affecting your money, your sleep or the people around you, stop and use a national gambling-harm helpline or support service.