The Lab · Foundations · updated 2026-10-22
Start here — the Lab in plain English
New to betting, a regular, or a numbers person — here's where to begin, every term the Lab uses in one place, and the record we've published, dated, beside today's.
A betting line is a price, and the price is usually right. Everything in the Lab grows from that one idea. Pick a reading path below that matches how much you already know.
Record figures marked as today's come live from the public record, refreshed as games are graded — as of Oct 30, 2026. Numbers we published on earlier dates stay as written, dated, so you can check them against today's.
The Lab explains how betting markets work, using the same math our board runs on and the record we grade in public. Nothing here is a pick. It's written for four kinds of reader, so start wherever you fit.
Pick your path
New to betting. Start with how to read a line, then what it costs to bet, then the favorite-or-underdog question everyone asks first. What a line really says → The vig → Favorites or underdogs? → How to track your bets
You bet sometimes. You know the basics and want to know what actually moves the needle — prices, props, parlays. Which sportsbook has the best odds? → Same-game parlays → Player props → The closing line
You bet seriously. You want to know what's been tested, what failed, and what's still standing. Seven ways we tried to beat the market → Why books disagree → Does line movement mean anything? → Why we stopped posting long shots
You read regression tables for fun. Calibration, power, and grading a probability rather than a pick. How often do favorites win? → How many games until a record means anything? → The Brier score → Reading a null result
The words, once
Every term below is used the same way in every article.
| Term | What it means |
|---|---|
| Moneyline | A bet on who wins. −150 means risk $150 to win $100; +130 means risk $100 to win $130. |
| Implied probability | The win rate a price demands to break even. −150 → 60.0%; +130 → 43.5%. More |
| Overround | How far the two sides' implied probabilities add past 100%. −110/−110 adds to 104.8%, so the overround is 4.8 points. |
| Hold | What the book keeps from every dollar bet, on average, if it balances its action. At −110/−110 that's 4.5%. Overround and hold are two views of the same fee; this Lab calls the fee the vig. More |
| De-vig / fair probability | The implied probabilities with the fee taken out, so they add to 100%. It's the market's honest opinion — and our board's number. |
| Edge | Your probability minus the price's break-even. Real edges are a point or two, and rare. |
| Expected value (EV) | What a bet returns on average per dollar: edge × payout. Long prices multiply small edges and small errors. More |
| Closing line / CLV | The last price before the game starts, and how much better your price was than it. The fastest honest grade a bet can get. More |
| Unit | A fixed slice of your bankroll, usually 1%. Units grade decisions; dollars grade your bankroll. More |
| Kelly (fractional) | Sizing a bet by how big its edge is. We stake a fraction of it, so one wrong estimate can't hurt much. |
| Calibration | When a model says 60%, does it happen about 60% of the time? Answerable in hundreds of games. |
| Brier score | The average squared miss of a probability. Lower is better; a coin flip scores 0.25. More |
| Standard error | How far a number could be off from luck alone. Two of them either side is the usual bar. More |
| Pre-registration | Writing a test's rules down before the games are played, so nobody can choose the test after seeing the result. |
| Same-game parlay | Several bets from one game, paid together. The legs move together, so the book prices them its own way. More |
| Exchange | A venue where bettors take each other's sides and pay a small fee instead of a vig. We include Novig in our consensus. |
The record, then and now
Every figure about our board that the Lab has published, with the date it was published, and today's live figure beside them. The board's "favorite" is the side the market gives more than 50%; "claimed" is the average probability it gave them.
| Published | Games | Favorite won | Market said | Gap (pts) |
|---|---|---|---|---|
| Jul 27, 2026 | 266 | 54.9% | 55.8% | −0.9 |
| Jul 28, 2026 | 311 | 54.7% | 55.9% | −1.2 |
| Aug 1, 2026 | 332 | 54.5% | 55.9% | −1.4 |
| Aug 15, 2026 | 519 | 55.1% | 56.6% | −1.5 |
| Oct 21, 2026 | 1,439 | 58.9% | 58.2% | +0.7 |
| Today live | 1,595 | 59.7% | 58.6% | +1.2 |
The sample grew more than fivefold, and at every date we published, the gap between what the market claimed and what happened was within about a point and a half. That's the market keeping its word — and the reason this site doesn't sell picks against it. The same trail for the few picks we've published, which still prove nothing either way:
| Published | Picks | Record | Avg CLV | Beat the close | ROI |
|---|---|---|---|---|---|
| Jul 27, 2026 | 1 | — | +16.43% | — | — |
| Aug 15, 2026 | 3 | 2–1 | +3.66% | — | +97.9% |
| Oct 21, 2026 | 14 | 6–8 | +6.58% | 64% | +55.6% |
| Today live | 14 | 6–8 | +6.58% | 64% | +55.6% |
What's running right now
Every test below had its rules written down before its games were played. Results get published whichever way they land.
- Frankenstein (Oct 22 – Nov 4): every number we evaluate, trusted 10% more and 10% less, one at a time — with a forecast of the result written down before the first game.
- The NHL back-to-back lead: the rested team against a team on the second night of a back-to-back, scored forward since Oct 10. Where it came from
- The hot streak: whether props that cleared their line 7+ of the last 10 beat their price. Promoted only if it clears two standard errors over 100 bets.
- Same-game prices: whether a sportsbook's same-game parlay price ever beats the fair price of the legs moving together.
Model output is informational and entertainment content, not betting or financial advice. If you bet, bet what you can afford to lose.
Log what you actually bet — units and dollars — and see it graded beside a model that publishes every call it makes, wins and losses alike. Free, no card.
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