Closing line value, usually shortened to CLV, is the single most common answer to the question "how do I know if I am actually any good at this, or just lucky?" It is also explained badly almost everywhere, usually by someone selling you something. So here is the plain version, followed by our own numbers, including the ones that make us look bad.
A bookmaker's price moves between the moment it opens and the moment the event starts. The final price, the one available just before kickoff, is called the closing line. It is the market's last word, after everyone has bet, after the team news is out, after the sharp money has landed.
Closing line value is the difference between the price you took and that closing price. If you backed a team at 2.10 and it closed at 1.90, you got a better price than the market's final verdict. That is positive CLV. If you took 1.90 and it closed at 2.10, the market moved away from you, and that is negative CLV.
Crucially, this has nothing to do with whether the bet won.
Backed at 2.00, closed at 1.80: (2.00 / 1.80 - 1) x 100 = +11.1%.
Backed at 1.80, closed at 2.00: (1.80 / 2.00 - 1) x 100 = -10.0%.
Two things people usually track: the percentage of bets that beat the close, and the median CLV across all of them. The first tells you how often you are ahead of the market. The second tells you by how much, without one freak result distorting the picture the way an average would.
A win rate over fifty bets tells you almost nothing. Variance in betting is brutal, and a losing approach can look excellent for months. CLV cuts through that, because it measures the decision rather than the outcome.
This is also why serious bookmakers restrict accounts that beat the close. They are not tracking your profit. They are tracking whether you are ahead of their own line, because that predicts your future profit better than your past profit does.
Most articles on this topic stop before showing anything real. Here is ours, from every settled bet we have published, broken out by market. We do not pool them, because different market types carry different margins and mixing them hides the story.
| Market | Bets | Beat the close | Median CLV |
|---|---|---|---|
| Match result, three way | 19 | 63% | +1.5% |
| Moneyline | 112 | 52% | +0.5% |
| Totals, over and under 2.5 | 38 | 50% | +0.2% |
| Totals, variable line | 86 | 36% | -0.5% |
Read that last row honestly: on variable line totals we beat the close only about a third of the time, and our median price was worse than the market's final word. The market was systematically moving against us there. That is not a rounding error, it is a signal that something in the approach was wrong, and it matched what the results eventually showed.
It is also worth being precise about what our closing price is. We capture it from a mainstream bookmaker shortly before kickoff, not from the sharpest book on the market. That makes these numbers directional rather than definitive, and we would rather say so than quietly present them as harder evidence than they are.
CLV is popular partly because it is easy to quote selectively. Anyone can show a screenshot of a bet that beat the close. The number only means something when it covers everything, including the periods where the market ran the other way.
That is why ours sits on a public record that we do not edit after the fact. Every settled bet is there, wins and losses, and when our own measurements told us a whole market was not working, we switched that market off rather than waiting for it to come good.