How It Works
Every pick on OpenBook starts with the same question: where is the market wrong? We look for mispriced lines by combining three signals — closing line value, sharp money movement, and public betting percentages — and only release a pick when enough of them converge. The result is a small, curated set of recommendations per day with a measurable edge. This page breaks down each signal and explains how they work together.
Closing Line Value (CLV)
Closing Line Value measures the difference between the odds you took and the odds available at game time. If you bet a team at +110 and the closing line is +105, you gained +5¢ of value — the line moved in your favor after your bet was placed. Positive CLV is the strongest statistical predictor of long-term profitability in sports betting. It means you consistently get better prices than the market's final consensus.
A +5¢ threshold is not arbitrary. Multiple large-scale studies of betting market data show that bettors who average +5¢ or more of CLV per pick sustain positive ROI over hundreds of bets, while those below breakeven on CLV eventually regress toward the vig. We track and publish CLV on every pick, every day — no exceptions. If we can't demonstrate positive CLV over time, the model isn't working.
Sharp Money
Not all betting volume is created equal. Sharp money — bets placed by professional bettors, syndicates, and sophisticated algorithms — moves lines. Public money fills them. We use VSiN's split-feed analysis, among other data sources, to distinguish between the two. When a line moves in one direction but the majority of tickets are on the other side, that's a sharp-money signal: the professionals are betting against the public.
We look for situations where sharp action accounts for a disproportionate share of the handle relative to the number of bets placed. Heavy money from known sharp accounts, combined with reverse line movement against public sentiment, gets flagged as a convergence candidate. We don't follow sharp money blindly — we verify it against our other signals first.
Contrarian Fades
When 70% or more of public bettors are on one side of a game, the line is often inflated. Sportsbooks shade lines toward the popular side to balance exposure, creating value on the less popular side. A contrarian fade means betting against the heavily public side — not because the public is always wrong, but because the price has been pushed past fair value.
Our threshold is 70% public betting on a single side. Below that, the signal is too noisy to act on. At 70% or higher, especially when combined with sharp money on the opposite side and positive CLV, the edge becomes actionable. The strongest plays — our Gold tier — typically show all three signals converging at once.
The Tier System
Every pick is assigned a tier that reflects how many signals converged and how strong the evidence was at lock time. This lets you calibrate your stake size to the confidence level of each recommendation.
All three signals converge: positive CLV at +5¢ or better, sharp money confirmed on your side, and a contrarian fade against 70%+ public betting. These are our highest-conviction plays and historically carry the strongest ROI.
Two of three signals present. Typically solid CLV with either sharp money or a contrarian fade, but not both. Strong plays with a demonstrable edge, just shy of the full convergence that defines Gold.
One clear signal supported by secondary context. Moderate CLV or a sharp-money lean without a strong public fade. These are speculative but grounded — we like the price, even if the convergence isn't complete.
A lean or observation, not a full pick. Thin CLV, mixed signals, or a line we're watching but not ready to recommend. Tip Jar plays are posted for transparency — you can follow them if you like, but they carry the lowest confidence and the highest variance.
Process Grading
A good bet can lose. A bad bet can win. That's the fundamental asymmetry that makes process grading essential. Process grading separates how we decided from what happened. A Gold-tier pick with +8¢ CLV, sharp money confirmation, and an 80% public fade that loses because the quarterback throws a last-minute interception is still a good process. We made the right decision; the outcome didn't cooperate.
Conversely, a Bronze pick with -2¢ CLV that wins on a weird bounce is a bad process that happened to work out. We don't celebrate it — we note the luck and remind ourselves not to mistake short-term noise for skill.
This distinction is central to how we evaluate our own performance. We track CLV, signal convergence rates, and process adherence alongside win-loss record. A winning streak with deteriorating CLV is a warning sign, not a celebration. A losing streak with strong CLV and signal convergence is frustrating but not a reason to change. We publish both the results and the process data so you can judge for yourself.