What Is Closing Line Value (CLV)? A Plain-English Guide for Bettors
Closing Line Value (CLV) explained simply — what it means, how to calculate it from your odds, why bettors track it, and how to record it by hand to understand your own decision quality over time.
Closing Line Value, or CLV, is one of the most useful numbers a bettor can track — and one of the most misunderstood. It is not about whether a single bet won or lost. It is a way to measure the quality of the price you got, compared to where the market ended up. This guide explains what CLV is in plain English, how to calculate it, and how to record it by hand so you can understand your own betting decisions over time.
What Is Closing Line Value (CLV)?
The closing line is the final set of odds offered on an event right before it starts. CLV measures whether the odds you took were better or worse than that closing number.
The idea is simple: the closing line tends to be the market''s sharpest, most accurate price, because it reflects all the information and money that came in beforehand. So if you consistently take odds that are than the close, it suggests your decisions were ahead of the market — a sign of skill rather than luck. If you regularly take worse odds than the close, the market moved against you.
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