Lay and exchange coverage, explained
Every matched bet has an exchange side. Here is what lay coverage should include and how to check it in a feed.
2 min read · Updated 22 Sep 2026
Most odds feeds are judged on their bookmaker prices. The exchange side needs the same checks.
The checklist
| Criterion | What to ask for |
|---|---|
| Market matching | The right exchange market paired to each bookmaker offer |
| Liquidity | The money available beside the lay price |
| Update time | A current lay price, on a response with a processed time |
| Liquidity checked | Pairs dropped when the exchange has too little money |
| The no-exchange case | Dutching offered where no exchange exists |
Back and lay, briefly
A back bet wins if an outcome happens. A lay bet wins if it does not. Matched betting pairs a bookmaker back price against an exchange lay price so the outcomes cancel, so the free bet or bonus is what you keep.
A matched offer is never one bookmaker price. It is a bookmaker price and its exchange lay price, and how good the offer is depends on how close those two are.
A lay price needs money behind it
A lay price is only real if there is money behind it. An exchange might show a good lay price with only a tiny amount available. Lay more than that and you move the price against yourself, or are not matched at all.
What lay coverage should include
A matched feed needs all four:
- The right exchange market for each bookmaker offer
- A current lay price
- The money available at that price
- No pairs where the exchange has too little money
Markets with no exchange
Exchanges are not universal. Many markets have no meaningful betting exchange, so there is no lay side to pair against.
Where that is the case, back and lay matched betting does not apply, and a feed should say so. Dutching, covering every outcome across bookmakers, can work instead. A provider that claims 'lay coverage' in a market with no exchange is overstating.
Where OddsRelay fits
OddsRelay's matched feeds pair each bookmaker offer with its exchange market, from Betfair, Smarkets, Matchbook and BETDAQ, and carry the current lay price with the money available at it. Pairs with no money behind the lay are dropped before they reach you.
From the blog
- The complete guide to matched betting odds dataBack prices, lay prices and the money on offer: what matched betting data holds and what you work out.
- How to evaluate odds-data coverageA headline bookmaker count says little. Test coverage by market depth and price age instead.
- Why lay liquidity matters in a matched odds feedA lay price with no money behind it cannot be taken. How to check a pair against your stake.