The difference between the price you bet and the market's closing price — the single best long-run indicator that a betting process is sound.
When you place a bet, the market keeps moving until the event starts. The closing line is the final, sharpest price. If you consistently bet at prices better than the close, you have captured positive closing line value, which over a large sample is the most reliable evidence that a process beats the market — independent of any single result.
BallBet tracks CLV on its recommended picks by comparing the price at recommendation time with the closing price, and reports it alongside record and return.
CLV is how BallBet grades its own process honestly: a pick can lose and still have been a good bet if it beat the close, and a sample of positive CLV is stronger evidence than a short-run win rate.
Beating the closing price consistently is the strongest available signal that a betting process has an edge, because the close is the market's sharpest number. It is more reliable over a large sample than a short-run win-loss record.