Closing Line Value (CLV): The Best Proof Your Bets Are Good
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Key takeaways
- CLV measures how your price compares with the final, most-informed price before the game starts.
- Calculate it against the devigged sharp closing line: CLV = fair closing probability × your decimal odds − 1.
- Results take thousands of bets to separate skill from luck. CLV gives a reliable signal in a few hundred.
- Sportsbooks track your CLV too. Consistently beating the close is one of the main reasons accounts get limited.
Every bettor has a hot streak or a cold one. The hard question is whether you’re actually good or just lucky, and results alone can take years to answer it. Closing line value answers it much faster.
What is the closing line?
The closing line is the last price before a game starts. By then the market has absorbed nearly everything: injury news, weather, lineups, models, and millions in sharp betting. At a sharp book like Pinnacle, the closing line is widely regarded as the best available estimate of the true probability. See why Pinnacle’s line matters.
Closing line value is how much better (or worse) your price was than that final estimate.
How to calculate CLV
The simplest version compares odds directly: you bet +110, and the line closed at +100. You beat the close.
The accurate version uses the devigged sharp closing line, because the raw closing price still includes margin:
That’s the EV formula, using the closing line as the fair probability. In other words, CLV is your bet’s expected value measured with hindsight.
Example
You bet a side at +110 (2.10) on Tuesday. At kickoff, Pinnacle closes that side at −105 and the other side at −115.
- Implied: 51.22% and 53.49%, total 104.71%
- Devigged: your side 48.92% (fair ≈ +104)
- CLV = 0.4892 × 2.10 − 1 = +2.73%
You got a price 2.73% better than the market’s final estimate. If you do that consistently, you’re very likely a winning bettor.
Run the numbers: Is this bet +EV against Pinnacle or another sharp line? Open the Expected Value Calculator
Why CLV beats results as a measure of skill
Sports results are noisy. A single even-money bet has a standard deviation of about 100% of the stake. A bettor with a genuine 3% edge on even-money bets needs roughly 4,400 bets before their profit is two standard deviations above zero. That’s years of betting for most people.
CLV is far less noisy. The difference between your price and the closing price varies by only a few percent per bet. A few hundred bets with a consistent positive average is a much clearer signal than the profit on those same bets.
| Question | Results tell you | CLV tells you |
|---|---|---|
| Were these bets good? | After thousands of bets | After a few hundred |
| Is a losing month bad luck or bad bets? | Hard to say | Positive CLV points to luck |
| Is a winning month skill? | Hard to say | Negative CLV says probably luck |
Get +EV bets flagged against sharp prices
ProfitDuel's EV Matcher and Odds Screener compare US sportsbook prices with the sharpest books in the world and surface bets that beat the fair line.
Start the $1 ProfitDuel trialAffiliate link. The $1, 3-day trial applies to ProfitDuel's Starter plan as listed in September 2026. 21+ and in states where online sports betting is legal.How to track CLV
- Log every bet: date, market, your odds, stake, book.
- Record the sharp closing line for both sides just before the event starts. Many odds tools can export historical closing prices.
- Devig the close with a consistent method. The devig guide explains the options.
- Compute CLV per bet and track the stake-weighted average over time.
- Review by market. You may find you beat the close on NFL sides but not on props. That tells you where your edge really is.
A spreadsheet is enough to start. If you use an EV tool, check whether it records the closing line for you.
Where CLV is less useful
- Markets without a sharp close. Many player props have no reliable sharp closing line to compare against.
- Arbitrage and hedged promos. These are locked in regardless of the close, so CLV doesn’t measure anything useful.
- Futures. Markets that stay open for months have wide margins and evolving information. CLV is noisier there.
- Live bets. There’s no single closing line to measure against.
The flip side: books watch your CLV
Sportsbooks know CLV predicts profit. Many risk teams look at whether a customer’s bets consistently beat the close, and they use that to decide who gets limited. Consistent positive CLV is exactly what makes you profitable and exactly what makes you a target.
That’s the central tension of sharp betting. Our guide to why sportsbooks limit winners covers how people manage it.
Frequently asked questions
Can I have positive CLV and still lose money?
Yes, over short and medium stretches. CLV tells you the bets were good, not that they won. Over a large enough sample, positive average CLV and profit should line up.
What's a good average CLV?
Any consistently positive number on main markets is good. Averaging +1% to +3% against a sharp devigged close is a strong result for most bettors. Very high averages usually mean you’re betting stale lines, which books notice quickly.
Do I need Pinnacle's closing line to track CLV?
It’s the most common benchmark, but any sharp, liquid closing market works. The key is that the closing line you compare against must be sharp. A recreational book’s closing line tells you much less.
Get +EV bets flagged against sharp prices
ProfitDuel's EV Matcher and Odds Screener compare US sportsbook prices with the sharpest books in the world and surface bets that beat the fair line.
Start the $1 ProfitDuel trialAffiliate link. The $1, 3-day trial applies to ProfitDuel's Starter plan as listed in September 2026. 21+ and in states where online sports betting is legal.