Closing Line Value (CLV) Explained

Closing line value (CLV) measures how much better your odds were than the market's final price before the event starts, best measured against Pinnacle's closing price with the margin removed; if your odds are consistently longer than that fair closing price, you are beating the market, which is the most reliable early sign that a betting process works.

Results take a very long time to separate skill from luck. CLV takes much less, because it measures something you control (the price you got) against the most informed estimate available (the closing line). This guide explains how to calculate CLV, why Pinnacle's close is the usual benchmark, what a good figure looks like, and the mistakes that make CLV look better than it is.

Why the closing line matters

Prices move from the opener until the event starts (see opening line vs closing line). Each move reflects money and information arriving. By the close, the price has absorbed the most information it ever will: line-ups, late news, and the bets of everyone who had an opinion and the money to back it.

At a sharp book such as Pinnacle, which takes large bets from winning players, the closing price is therefore a very good estimate of the true probability. It is not perfect, but it is hard to beat consistently. If you can, you are doing something right: your bets were value bets by the best available measure.

How to calculate CLV

The basic formula compares your odds with the closing odds:

CLV = your odds ÷ closing odds − 1

If you took 2.10 and the market closed at 2.00, your CLV is 2.10 ÷ 2.00 − 1 = +5.0%.

That simple version has a flaw: the closing odds include the bookmaker's margin. A better version uses the fair closing price, with the margin removed.

1. Take Pinnacle's closing prices for every outcome of the market.
2. Remove the margin (devig) to get fair prices. You can do it in the devig calculator.
3. Compare your odds with the fair closing price of your selection.

Example: Pinnacle closes a two-way market at 1.95 / 1.95. The fair price of each side is about 2.00. You took 2.08. Your CLV against the fair close is 2.08 ÷ 2.00 − 1 = +4.0%. Against the raw close it would have been about +6.7%. The difference is Pinnacle's margin, and it would flatter you on every bet. To run these formulas over every bet you place, see the bet tracking spreadsheet guide.

Three ways to report CLV

Calculators and trackers report CLV in three ways. They measure the same thing, so know which one you are reading. With the example above (you took 2.08, Pinnacle closed 1.95 / 1.95):

With a multiplicative devig, the first two are linked: 1 + no-vig CLV = (1 + raw CLV) ÷ S, where S is the sum of the closing market's implied probabilities. Here S = 1.0256 and 1.0667 ÷ 1.0256 = 1.040. The raw figure is always flattered by the closing margin, so compare no-vig figures with no-vig figures.

Which devig method to use

The margin is not removed the same way by every method. On evenly priced markets they barely differ. On short favourites and long outsiders they can disagree by enough to matter.

If you are unsure, use the most conservative result of several methods. Our devig methods guide explains each one in more detail.

What is a good CLV percentage?

A good CLV is an average that stays above zero against Pinnacle's no-vig closing price over several hundred bets; the higher and steadier it is, the better, but there is no official threshold. Because no-vig CLV compares your odds with the best estimate of the true probability, an average of +2% means your prices were, on average, about 2% longer than the fair close.

Anyone quoting a precise "good number" without context is simplifying. A few honest rules of thumb:

• Positive on average over a large sample is what matters. A few hundred bets is a start; more is better.
• Consistency matters more than size. A small positive average across many bets is more convincing than a large one across a few.
• Compare like with like. CLV on main lines in big leagues is harder to achieve than on props or lower divisions, where closing prices are less efficient.

If your average CLV is negative over hundreds of bets, your process is not finding value, whatever your results say.

Measuring CLV after a bookmaker limits you

A limited account still gives you a price, just at a smaller stake. CLV measures the price, not the stake, so you can keep measuring.

• Keep the benchmark sharp. Measure against Pinnacle's fair close, not the closing price of the bookmaker that limited you. A soft book's close can be shaded, and it tells you nothing about the market.
• Log the stake you were allowed. Record the stake and odds the bookmaker actually accepted, including partial acceptances.
• Report CLV two ways. An unweighted average shows the quality of your prices. A stake-weighted average shows the quality of the money you got down. When limits cut your best bets most, the two drift apart.
• Track CLV by bookmaker. It shows which accounts still give you prices worth taking and which ones only accept bets after the price has moved.

CLV vs results

Results swing. A bettor with a real edge can lose for weeks. A bettor with no edge can win for months. Over a short period, results tell you very little.

CLV is different: every bet gives you a measurement, whether it wins or loses. That is why it settles much faster. It does not promise anything about future results, but a long run of positive CLV is strong evidence that you are taking better prices than the market eventually settles on, and over a large number of bets that tends to show up in results too.

Where CLV comes from in dropping-odds betting

Dropping-odds betting is built to produce CLV. When Pinnacle's price falls and your bookmaker still shows the old number, you take a price that the market has already moved past. If the move holds until the close, your bet beats the closing line. If it reverses, it may not. Our article on what dropping odds are covers the workflow, and steam moves explains which moves tend to hold.

A worked example

With round numbers: Pinnacle's home price falls from 2.30 to 2.08 and its fair price becomes about 2.15. You take 2.30 at your bookmaker. At kick-off Pinnacle closes at 2.05, fair price about 2.12. Your CLV is 2.30 ÷ 2.12 − 1, about +8.5%. The bet itself may win or lose. Do this a few hundred times with a positive average and you have real evidence about your process.

Common mistakes

Using the raw close. It includes the margin and inflates every figure.

Using the wrong close. The close must be for the same market, line and period. A closing price for a 2.5 total says nothing about your 2.75 bet.

Using a soft book's close. Soft bookmakers' closing prices are less efficient and often shaded. Use a sharp reference: see how to use Pinnacle as a sharp reference price.

Recording the alert's odds instead of yours. Log the odds you were actually given.

Judging too early. Twenty bets are not a sample.

Mixing markets in one average. CLV on a main-line football bet and CLV on an esports prop are not the same quality of evidence, because the closing prices are not equally efficient. Track them separately as well as together, so a strong figure in a thin market does not hide a weak one where the market is sharp.

Logging only some bets. If you log the winners and forget the losers, or the reverse, your CLV is meaningless. For past bets logged without a close, a Pinnacle odds history archive can fill the gap for some markets.

How Pinnacle Terminal handles this

Pinnacle Terminal's tracker records Pinnacle's closing price automatically for every bet you log, from the app or from a Telegram alert. It calculates CLV against the fair close using four devig methods (multiplicative, additive, power and Shin) plus a worst-case figure, and shows it for every logged bet. The tracker and CLV guide shows how to log bets and read the numbers; if you have not opened the terminal yet, start with getting started. To see how other trackers measure CLV, and which closing price each one uses, read CLV tracking tools compared.

FAQ

What is closing line value in betting?

How far your odds beat the market's last pre-event price, ideally measured against a sharp book's closing price with the margin removed.

How do I calculate CLV?

Divide your odds by the fair closing odds and subtract 1. For 2.10 against a fair close of 2.00, CLV is +5%.

Why use Pinnacle's closing line?

Because Pinnacle accepts large bets from winning players and runs a low margin, its closing price is one of the best public estimates of the true probability.

What is the difference between raw CLV and no-vig CLV?

Raw CLV compares your odds with the closing odds as quoted, margin included. No-vig CLV compares them with the fair closing price after the margin is removed. Raw CLV is always higher by roughly the closing margin, so it overstates your edge.

What is a good CLV percentage?

Any average above zero against Pinnacle's no-vig close, held over several hundred bets. There is no official threshold: a steady small positive average is more convincing than a large one over a few bets, and main lines in big leagues are harder to beat than props or lower divisions.

Is positive CLV enough?

It is the best early evidence of a working process, but it needs a large sample and honest logging. Your bookmaker may still limit your account.

What if my CLV is positive but I am losing?

Over a short period, that is normal variance. Over a long period, check that you are using the fair close and logging every bet.

Try it

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