Why beating the close is not the same as making money

Closing line value measures whether you got a better price than the market's final one. Profit measures whether the results went your way. They correlate over long horizons and are unrelated over short ones.

The closing line is accurate in aggregate, which is a statement about thousands of games. On any individual fixture it is frequently wrong, and being ahead of a number that turned out to be wrong does not pay anything.

It also fails in the other direction. A bettor can be behind the close all season and profit, if the closing lines happened to be wrong in the way they were wrong. Over enough bets that stops happening.

And that is the trap. Treating CLV as a scoreboard invites the same short-horizon over-reading as treating the win column as one, just with a more sophisticated number attached.

What to do with it. Track both, review them monthly, and use CLV to decide whether the process is sound and profit to decide whether it is worth continuing.