Parlay builder

What it does

The Parlay builder takes the +EV legs at one book and searches for the best parlays of 2 to 6 legs by EV. The legs are the same rows and fair prices as the +EV screen: each price is compared with a fair price built from the other books, with the book you're betting left out of its own fair, under your Fair value settings.

A worked example: three legs at one book, −110 with a 54.5% fair chance (+4.0% EV), −105 at 52.5% (+2.5%) and +120 at 47.0% (+3.4%). The parlay pays an estimated +720 (8.20×), the fair chance is 13.4% (fair +644), and the EV is +10.3%. Small edges compound, and so does variance: the parlay hits about one time in seven.

Each row shows EV, the PARLAY (legs, games and the first start time), LEAGUES, every leg with its price, fair odds and EV, PAYOUT (the estimated payout, fair odds and chance to hit) and a KELLY stake on your bankroll. Click a row for the leg table, any same-game flags and the written math. The payout is an estimate: books can price a parlay differently from the product of its legs, so confirm it in the bet slip.

Who it's for

• Parlay bettors who want every leg to be +EV on its own, not a story.
• Bettors who play parlays at one main book and want the strongest legs there.
• Anyone who wants to see how fast a parlay's chance to hit falls as legs are added.

Coverage

Parlay books: regulated US sportsbooks and sweepstakes books only, from your My books when you've set them. Exchanges and prediction markets don't sell parlays as a product, and offshore books are never offered. Every leg of a parlay is at the one book you pick.

Legs: any +EV row the +EV screen finds at that book (player props, game lines and alternates) after your filters, with a minimum EV per leg. The search runs over the top 40 legs and keeps the best 30 parlays.

Sports the collector is built for: NFL, college football, CFL, NBA, WNBA, college basketball, NHL, MLB, KBO, NPB and soccer (Premier League, MLS, La Liga, Bundesliga, Serie A, Ligue 1, Champions League). What you see on a given day depends on what is in season and what the books have posted.

Pregame only. There are no live odds anywhere on the site, and a game drops off every tool at its start time. Refresh speeds up near the start: game lines every minute inside 2 hours, every 5 minutes from 2 to 12 hours, every 15 minutes from 12 to 36 hours and every 3 hours beyond; props every 5, 15 and 60 minutes in the first three windows. A credit budget guard slows the far windows first if credits run low. The ● Live · 12s badge in the top bar shows the true age of the newest collector run and turns amber (Delayed) when it is older than it should be.

What to check before you bet

• The payout in the bet slip. If the book pays less than the product of its single-leg prices, the EV is lower.
• same game flags. Their EV is an independent estimate only; the book prices same-game parlays its own way, and we never claim a same-game parlay edge.
• Every leg is still at the price shown. One leg moving can erase the edge.
• Stake size. Parlays are high variance; most bettors stake well below Kelly.

How to use it

1. Open the Parlay builder under Find edges and pick the book with Book:.
2. Choose Legs (2 to 6, default 3), a league, a maximum parlay price (default up to +1000) and a minimum EV per leg (default 1%).
3. Leave Exclude same-game legs on (the default) for independent legs only. Off allows same-game legs where the pair isn't negatively correlated, and flags them.
4. Open View leg pool to see every +EV leg at the book, or click a parlay for its legs and math. Copy copies the legs and prices; + Track saves the parlay on this device.