## What Is Closing Line Value?
Closing Line Value (CLV) measures whether the price you took was better or worse than the final closing price at a sharp reference bookmaker (Pinnacle is the standard).
CLV = (1/Your odds) − (1/Pinnacle closing odds)
Expressed as a percentage of stake:
CLV % = (Pinnacle closing price / Your price − 1) × 100
**Example:**
You bet at 2.50. Pinnacle closes at 2.20.
CLV % = (2.50/2.20 − 1) × 100 = (1.136 − 1) × 100 = +13.6%
You took significantly better odds than the closing price — positive CLV.
## Why CLV Is the Best Edge Indicator
Results in a small sample are dominated by variance. A 60-bet winning run can occur with zero edge; a 40-bet losing run can occur with real edge.
CLV is not subject to result variance. If you consistently beat the closing line, you have genuine edge — regardless of short-term results. If you consistently fail to beat the closing line, you do not have edge — regardless of short-term winning runs.
Research by academic and professional bettors has confirmed: positive average CLV is the most reliable predictor of long-run profitability.
## Tracking CLV Systematically
For every bet placed: record the Pinnacle closing price at kickoff. Calculate CLV immediately after the event.
Track rolling average CLV over:
- Last 50 bets (short-term signal)
- Last 200 bets (medium-term validation)
- All-time (the definitive measure)
Target: average CLV > 2% (after Pinnacle's 2% margin, this represents a real edge of approximately 0–2% net of margin).
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