Betting exchange liquidity describes how much can be matched at particular prices. A prominent price with £12 underneath it does not establish that a £70 request will all be accepted there. Nor does a large total-matched figure mean that the same money remains available for a new bet.
This guide reads the English-language Betfair Sports Exchange help and developer documentation checked on 25 October 2026. It concerns sports markets, not Exchange Games or a fixed-odds Sportsbook ticket. The prices and amounts below are invented teaching inputs. No account, live market, order or payout was tested; product access and terms depend on location.
Read the amount beside the price
Betfair's Sports Exchange introduction explains the blue back and pink lay columns. The figure beneath an odds quote indicates the stake expected to match at that price. Its warning matters: prices can change before a request reaches the market, so even that displayed amount is not a reservation.
For a back bet, higher decimal odds mean a larger conditional return for the same stake. Lower prices further down the available-to-back ladder are different terms, not extra capacity at the headline price. On the lay side, distinguish the backer's stake from the layer's possible loss. Our matched and unmatched Exchange guide covers that liability calculation, cancellation confirmation and the unaccepted remainder.
Here, depth means the amounts offered across several price levels for the same selection and side. A best-price tile is only one level. Combining the blue and pink amounts would mix opposite sides rather than measure how much of one back request can be accepted.
A static ladder with three different prices
Imagine a fictional market for one team to win a football match. The following snapshot shows amounts available to back that single selection, in pounds. All three offers are assumed to remain available throughout the example, with no competing orders, suspension, cross-matching complication, fee or settlement adjustment.
| Decimal price | Back stake available at this level | Cumulative back stake | Conditional winning gross return for this row |
|---|---|---|---|
| 3.10 | £12 | £12 | £37.20 |
| 3.05 | £18 | £30 | £54.90 |
| 3.00 | £40 | £70 | £120.00 |
The best displayed back price is 3.10, but only £12 is shown there. The £70 cumulative figure includes £58 offered at lower odds. Calling the whole ladder "£70 available at 3.10" would change the example's inputs.
Consider a request for £70 with a minimum acceptable price of 3.00, Best Price Execution enabled and MatchMe disabled. Under the stated static assumptions, the fills can be £12 at 3.10, £18 at 3.05 and £40 at 3.00. Betfair's Best Price Execution explanation expressly describes splitting a requested stake between a better price with less capacity and another acceptable price.
If the selection then wins normally, the fictional gross return is £37.20 + £54.90 + £120.00 = £212.10. That includes the £70 stake, leaving £142.10 before charges. If it loses, the £70 matched back stake is lost. These are alternative settlement outcomes, not money earned by filling an order.
The stake-weighted average decimal price is £212.10 divided by £70, or 3.03. An unweighted average of the three quotes would be 3.05 and would misstate this collection of fills. If a statement reports an average, preserve the component stakes and prices needed to check it.
A larger request does not silently change its limit
A £70 request requiring 3.10 is different from the request above. In this unchanged snapshot, only £12 meets that minimum; the £58 at lower prices does not. An amount still awaiting a match should not be entered into a return calculation as though it had been accepted.
The cited Best Price Execution page separates improvement from accepting worse odds. With that feature alone, a request is not matched below its required price. MatchMe can permit a lower price for a back bet within its configured threshold. Record the actual setting rather than assuming it was on, off or identical between channels.
This guide does not recommend a threshold or predict which setting will fill a wager. A more permissive instruction changes the terms that can be accepted. It does not make the selection more likely to win.
Historical matched volume is a different record
Betfair's developer market-data guide separates the available back/lay ladder, the traded ladder and the last matched price. A traded amount describes completed matching, while an available amount describes current offers. The last matched price records a transaction; it is not a promise that another stake can now be accepted there.
Suppose a separate label in the fictional market says £50,000 has been matched. It does not add £50,000 to any row of our table. That label might cover the whole market rather than the chosen runner, and it does not identify how much remains at 3.10. Keep the market, selection, side and time alongside the number.
The developer guide also distinguishes offers with and without virtual prices. A display and an API response using different filters need not show an identical ladder. This is a reason to preserve the view's settings, not evidence that a particular screen is wrong. We did not request an authenticated feed or measure update speed.
Reconstruct the fill, not just the screenshot
For an unexplained difference between a displayed quote and an accepted order, retain:
- The product, market and selection identifiers, side and displayed currency.
- The snapshot time, price levels and any data-view filters.
- The requested stake, required price and applicable price settings.
- The final matched stakes and prices, plus any still-open remainder.
Use the accepted components to check the weighted price. Treat subsequent settlement and charges separately; our Exchange commission guide explains why matched stake, winning gross return and net market winnings are different measures.
Liquidity can change between observation and acceptance. A screenshot explains what was visible, while the final order record establishes what actually matched. Neither record proves a future profit. Only adults may gamble, subject to local law. Gambling can lead to financial harm. Further support context is available in our responsible-gambling information.
Frequently asked questions
Does a large total-matched figure guarantee my stake will match?
No. Historical matched volume and current available size answer different questions. A large market total does not establish the amount offered now on your chosen selection, side and price. Check the relevant ladder and final order record. The fictional £50,000 label in this guide supplies no extra capacity at 3.10.
Can one Exchange request match at several prices?
Yes, under the stated price settings and available offers. The example's £70 minimum-3.00 request is split across three acceptable levels, producing a stake-weighted average of 3.03. This is a static illustration, not a guaranteed fill. Changing the limit, availability or settings changes which parts can be accepted.
Is the last matched price still available to bet at?
It records a previous match, not a currently reserved offer. Another amount may remain there, or it may not. The available ladder and the eventual accepted order answer those later questions. Do not use a historical transaction price as the assumed price for an unmatched stake or a proposed new request.