Closing Line Value (CLV): Meaning, Formula & Calculator
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The Wise Guy Desk · Sharp Money School

Closing Line Value (CLV)

Closing line value explained: what CLV means, the exact formula, a free CLV calculator, and why beating the close is one of the best predictors of long-term betting profit.
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Closing line value (CLV) measures the price you bet against the final price when the market closed. Beat the close consistently - bet -105 on a side that closes -120 - and you are getting better numbers than the market's final judgment, which professional betting operations widely treat as one of the most reliable predictors of long-term profit. Positive CLV compounds; negative CLV bleeds, even while you are winning. Updated October 4 at 12:20 AM ET.

🧮 CLV calculator your price vs the closing price, in one number

The CLV formula

Convert both prices to implied probability, then compare: CLV% = (closing implied probability minus your implied probability) divided by your implied probability. Bet a side at -105 (51.2% implied) that closes -120 (54.5% implied) and you beat the close by about 6.4% - the market ultimately agreed with you and priced it worse for everyone who came later. The calculator above does the conversion instantly.

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Why CLV predicts profit better than your record

Short-term win-loss records are mostly noise; a coin flipper hits 57% over 100 bets often enough to fool themselves. CLV strips the luck out. If your bets consistently beat the closing number, you are systematically finding prices the market later corrects - the definition of edge. If your record is winning but your CLV is negative, the market is telling you the wins are borrowed.

How to actually improve your CLV

Three habits: bet early when your read is strong (the close punishes hesitation), shop every book for the best number (the same side can differ by 15 cents across books - the line shopping tool does this automatically), and track it honestly. The Wise Guy bet tracker grades the CLV of every bet you log automatically against the real closing line, free with an account - the same discipline the pros run.

The Wise Guy sharp-money toolkit

These free tools work together: the sharp money tracker shows where the big money disagrees with the crowd right now, the line movement tracker catches steam and reverse line movement as books react, the RLM guide teaches you to read those moves, and the closing line value guide shows how to grade yourself like a professional. The raw numbers behind all of it live on the betting splits boards, and the Kelly calculator sizes whatever you find.

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Frequently asked questions

What is closing line value?

The difference between the price you bet and the final market price at close, expressed as a percentage. Beating the close means you got a better number than the market's final judgment.

How do you calculate CLV?

Convert your odds and the closing odds to implied probabilities, then compute (closing minus yours) divided by yours. Betting -105 on a line that closes -120 is roughly +6.4% CLV. The calculator on this page does it instantly.

What is good CLV?

Consistently positive is the goal. Professionals live around +1.5% to +3% average CLV across large volumes; anything sustained above zero across hundreds of bets suggests real edge rather than luck.

Does CLV matter more than winning?

Over a season, yes. Records swing with variance; CLV converges on your true skill fast. A winning record with negative CLV usually regresses; a break-even record with positive CLV usually improves.

Can I track my CLV automatically?

Yes - the free Wise Guy bet tracker records your price on every logged bet and grades it against the actual closing line automatically, alongside your record, ROI and net.