What winning on an exchange means
Every price is a probability in disguise. A -110 price says the outcome happens 52.38% of the time; a 42¢ contract says 42%. You have an edge when the price you can take implies a lower probability than the outcome actually has — that gap, repeated across many bets, is the only thing that makes a bettor profitable. Nothing else does, and no amount of confidence in a pick substitutes for it.
The practical version is simpler. When two venues price the same outcome and one is cheaper, the cheaper price is the better bet, whatever you think of the outcome. That is the entire idea behind this site, and it is the only claim on this page.
How Polymarket prices differently from a sportsbook
Polymarket is an order-book market: the price is whatever two traders agree on, and a share that settles at $1 quotes as a probability directly.
Polymarket's taker fee is a fraction of a percent, which makes its headline quote very close to the all-in cost and often the cheapest of the exchanges in the middle of the price range.
Polymarket runs deep liquidity on headline games and much thinner books on the rest of the slate, and its player-prop coverage is still filling in — check the size behind a quote, not just the quote.
Polymarket's edges tend to be largest on games the order book is actively trading and unreliable on markets where almost nobody is quoting.
What an edge looks like
Take a prop priced at -115 at a sportsbook and at +100 on an exchange. The book's price implies 53.5%, the exchange's implies 50.0%, so the exchange is charging 3.5 cents less per dollar for the identical outcome. Nothing about the bet changed; the cost of making it did. No Polymarket gaps are live at this moment — they reappear as each slate's boards open.
A gap that size does not make a bet a winner. It makes it a cheaper bet, and cheaper bets are what compound. Results over any short run are dominated by variance, and a run of losses tells you nothing about whether you were getting the better price.
Where Polymarket is the better price right now
No props are currently cheaper on Polymarket than at the best sportsbook. Prices repopulate as each slate's boards open.
Winning on Polymarket — FAQ
Can you actually win on Polymarket?
Some people do and most people do not, and no page can tell you which you will be. What is measurable is the price you pay: taking the cheaper of two prices on the same outcome improves your expected result, and paying the more expensive one worsens it.
How do you find a good price on Polymarket?
Compare the Polymarket quote to what every sportsbook is charging for the identical outcome, converted to implied probability so the two are the same unit. BeatVig does that conversion continuously and lists the props where Polymarket is currently the cheaper side.
Is Polymarket cheaper than a sportsbook?
On many props it is, because a sportsbook builds its margin into the line while Polymarket charges separately from the price. It is not cheaper on everything, and the only reliable way to know is to check the specific prop you want.
What does it cost to trade on Polymarket?
Polymarket's taker fee is a fraction of a percent, which makes its headline quote very close to the all-in cost and often the cheapest of the exchanges in the middle of the price range.
Does taking a better price mean the bet will win?
No. A better price improves the long-run expectation of a bet and changes nothing about whether that individual bet wins. Short-run results are dominated by variance, and bets can and do lose at any price.
Polymarket across the site
BeatVig compares prices. It is not a sportsbook or an exchange, accepts no wagers and sells no picks. Bet only what you can afford to lose. 21+. If you or someone you know has a gambling problem, call 1-800-GAMBLER, or read our responsible gambling page.