On an exchange you don't bet against the bookmaker — you trade with other people. A Back bet says something will happen. A Lay bet takes the other side and says it won't.

How laying the correct score works

When you lay 0-1, you win if the match ends with any score other than 0-1. It sounds easy, and that's exactly where the risk lives.

Lay oddsStake receivedLiability
8.00$10$70
15.00$10$140
30.00$10$290

Liability is what you pay if the score lands. The higher the odds, the bigger the possible loss.

Laying isn't "easy money". It's selling insurance: you collect a little many times and may pay a lot at once.

The right question before you enter

Not "will this score happen?" but: is this score's probability lower than the odds imply?

  1. Convert the odds into implied probability: 1 / odds.
  2. Compare it with the score's estimated probability.
  3. There's only value if your estimate is consistently lower than the implied one.

To go deeper, read how to read the probability of each score.