CLV = closing line value.

According to Pinnacle (which is the sharpest bookmaker in the world): "The most accurate way we have found, to distinguish winning and losing players is to look at the odds a player received when they made their bet, and compare it with the Pinnacle Sports closing line on the game. If a player consistently beats our closing price, they are likely to be a long-term winner – period. Interestingly, we have found that this test is more reflective of a player’s future winning potential, than their historical win/loss record with the company."