Parlay Builder
The engine builds the parlay for you. We take tonight's qualified +EV plays and assemble the best 2–5 leg ticket for each style — from safest to long shot — with the true combined odds, model hit chance, and compounded edge.
Why stacking +EV plays compounds your edge
A normal parlay is a sucker's bet because every leg carries the book's vig — multiply five −4.5% legs together and you're handing over more than 20% before you've even picked winners. The Parlay Builder flips that: it only ever stacks plays the engine has already flagged as positive expected value, where the price you're getting beats the de-vigged fair odds.
When legs are independent, the combined edge is EV = ∏(1 + edgeᵢ) − 1. Because every factor is greater than one, the product grows — your edge compounds with each leg you add. What falls is the probability the whole ticket hits, which is why the builder shows both numbers side by side and sizes the stake conservatively.
Frequently asked questions
- How does the parlay builder pick legs?
- It starts from the same qualified +EV plays as the +EV feed — each carries the engine's de-vigged 'fair' probability of hitting. For your chosen leg count it then picks the optimal legs for each style: Safest (highest combined hit chance), Balanced (highest engine conviction), Best value (highest compounded edge), and Long shot (biggest payout that's still +EV).
- Aren't parlays always a bad bet?
- Ordinary parlays are −EV because each leg carries the book's vig. These are different: every leg is already a vetted +EV play, so the combined edge compounds — mathematically EV = ∏(1 + edgeᵢ) − 1, which is positive. The trade-off is variance: the more legs, the higher the payout and the lower the chance the whole ticket hits.
- Does it account for correlation?
- It uses at most one leg per game, so the legs are independent and the odds multiply honestly. It does not model same-game correlation, so if you add correlated legs (e.g. a team's moneyline plus its total) yourself, the true odds will differ from a simple multiplication.
- How big should I bet a parlay?
- Each ticket shows a suggested stake as a fraction of your bankroll using half-Kelly with a per-ticket cap. Because parlays are high-variance, that figure is intentionally small — treat it as a ceiling, not a target.
Want to price your own legs by hand? Use the Parlay Calculator. Or browse every qualified edge on the +EV feed.