Free, no signup. Last updated 15 August 2026.
The closing price is the market at its most accurate, after all the money and the team news have moved it. Beating it consistently is the clearest evidence that you are finding value rather than running hot.
CLV = (odds taken ÷ closing odds − 1) × 100
If you backed something at 2.00 and it closed at 1.80, you took a price 11.1 percent better than the market's final word. Whether that particular bet won is almost beside the point: you bought at a better price than the sharpest estimate available, and doing that repeatedly is what a long-term edge looks like from the inside.
Profit over a short run is mostly variance. You can bet badly and win for two months, or bet brilliantly and lose for two months. CLV is visible immediately on every single bet, needs no waiting for results, and converges far faster than profit does. Bookmakers themselves use it to decide whose accounts to limit, which tells you how much signal they think it carries.
Closing line value is the difference between the odds you took and the odds the same market closed at. Backing at 2.00 something that closes at 1.80 is positive CLV of about 11 percent, meaning you bought better than the market's final price.
Because the closing line is the most accurate probability estimate available, and it is visible on every bet immediately. Profit needs hundreds of bets before it separates skill from luck; CLV starts telling you within dozens.
Yes, over a short run. CLV says you are consistently buying at better than fair value, which produces profit over time, but variance can and does bury that over weeks or months.
Often, yes. Bookmakers track it, and accounts that consistently beat the close tend to have their stakes cut. It is an uncomfortable confirmation that the metric works.
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