CLV — Closing Line Value

CLV (Closing Line Value) compares the price you bet at to the closing price (the last fair odds just before kick-off). Because Pinnacle’s closing line is the sharpest on the market, consistently beating it is the best predictor of long-term profit — far more reliable than the outcome of any single bet. Positive CLV = you took a better price than the final market. Over hundreds of bets, a positive average CLV trends toward positive ROI.

How to compute it

CLV% = (bet_odds / closing_odds − 1) × 100 Example: you bet at 2.10, the close settles at 1.90. 2.10 / 1.90 − 1 = +10.5% → you beat the close by 10.5%.

Use the fair (devigged, todds) closing price rather than the raw odds: the margin skews the comparison. The /api/clv endpoint already returns a margin-free CLV.

With apinn

The /api/clv endpoint does the math for you: pass the event, period, market, selection and your bet_price.

Query the CLV of a bet

curl "https://api.apinn.io/api/clv?event_id=1632370816&period=0&market=moneyline&selection=draw&bet_price=3.5" \
  -H "X-API-Key: YOUR_KEY"
# → { "closing_price": 3.11, "clv_pct": 12.54 }

Track your portfolio's average CLV

Store each bet’s clv_pct and track the average over time — it’s your profitability compass.

Python

import requests

BASE, H = "https://api.apinn.io", {"X-API-Key": "YOUR_KEY"}

# your past bets: (event_id, period, market, selection, price taken)
bets = [
    (1632370816, 0, "moneyline", "draw", 3.5),
    (1632370817, 0, "moneyline", "home", 1.95),
]

clvs = []
for event_id, period, market, sel, price in bets:
    r = requests.get(f"{BASE}/api/clv", headers=H, params={
        "event_id": event_id, "period": period, "market": market,
        "selection": sel, "bet_price": price}).json()
    clvs.append(r["clv_pct"])
    print(f"{event_id} {sel}: CLV {r['clv_pct']:+.2f}%  (close {r['closing_price']})")

if clvs:
    print(f"\nAverage CLV: {sum(clvs)/len(clvs):+.2f}%")

Best practices

Judge on CLV, not the result: a losing bet with positive CLV is still a good decision.
Volume: CLV only means something aggregated over many bets.
Timing: the earlier you bet (before the line hardens), the higher the potential CLV — see dropping odds.
Benchmark: always compare against the Pinnacle close, the most efficient line.

Get started

Concepts

CLV — Closing Line Value

How to compute it

With apinn

Best practices

​How to compute it

​With apinn

​Best practices

How to compute it

With apinn

Best practices