Parlay Builder
Build NFL, NBA, college and NHL parlays from the sides proven prediction-market bettors hold and sportsbook prices above the fair price, with the fair odds and value of every parlay. Free.
How it works
- Choose sports, a style and a sportsbook.
- Get the best two-, three- and four-leg parlays at one book, with the book's price, the fair odds and the value.
- Or tick legs yourself; legs priced below fair are flagged because they add vig.
- Track a parlay on My Bets or open the sportsbook.
Parlay Builder: quick answers
Where do the parlay legs come from?
Two sources. Sides that proven Polymarket bettors hold (70% or more of the proven money at the same line, $100 or more), kept while a sportsbook price is within 2% of fair. And sportsbook prices at least 2% above the fair price (Pinnacle without its margin, or the exchanges).
How do you know if a parlay is worth betting?
Multiply each leg's fair chance to get the parlay's real chance, then compare it with what the book pays. Value = chance x decimal payout - 1. Every leg priced below fair multiplies the book's edge, which is why most parlays lose money.
Are these parlays proven winners?
No. Neither source has passed its forward test yet. Each day's first suggestion for every style and size is logged and graded publicly as forward test PB1 on our record page, against the same games' other sides.
Can I mix sports or pick my sportsbook?
Yes. Pick any of NFL, NBA, college football, college basketball and NHL, a style (conservative favourites, balanced, or big underdogs) and a sportsbook. A parlay is always priced at one book, since books do not combine legs from other books.