If you can only track one number about your betting, track closing line value. Not win rate, not ROI, not parlays-cashed. CLV.
Here's why: win rate over a small sample is noise. ROI is noise plus odds-mix. Both can lie to you for months. CLV is the market telling you whether you got the better of the bookmaker — and the market is the only judge that doesn't care how you feel about it.



