What is closing line value (CLV)? Definition and example
Closing Line Value compares the price you took with the price the market closed at. Take 2.10 on an outcome that closes at 1.95 and you beat the close by about 7.7% — positive CLV. Take 1.90 on the same outcome and you got negative CLV: the market says you paid too much.
Why does this matter more than won or lost? Because any single bet — and any short run of bets — is dominated by luck. A losing bet at great odds was still a good decision; a winning bet at terrible odds was still a mistake. The closing line is the market's most informed opinion, sharpened by every bet placed before kick-off. Consistently beating it is the one statistical signature of skill that cannot be faked for long.
Research on sharp bookmakers shows the closing price is the best publicly available estimate of true probability. That is why professional bettors track CLV obsessively and why winning accounts get limited: books measure customers by it too.
A tipster who shows you profit but hides the odds movement is showing you weather, not climate. That is why every prediction on TipsAudit is logged before kick-off and settled against the closing line — our whole track record is a CLV ledger, losses included.
See how we apply this on every match in our methodology. Methodology →
Frequently asked
What is a good closing line value?
Consistently above zero. Against a sharp bookmaker's close, +1% to +2% over a few hundred bets is already a strong signal. Larger averages do appear when the bet is taken at a soft bookmaker that is slow to move its price (that is what our value alerts measure), but they shrink when the price is taken later or cannot actually be got, and they still need hundreds of bets to trust.
How many bets do you need to trust a CLV figure?
Far fewer than for ROI. CLV has low variance because it compares prices, not outcomes: a few hundred bets usually give a confidence interval narrow enough to say whether it is positive. ROI at the same sample size still has an error bar of several percentage points.
Related concepts
The closing line Variance and sample size Why win rate misleads
See these ideas at work in our public track record — calls logged before kick-off, losses included.