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The data behind everything we post is free. Trade, bet or build on it here 👇

Joined April 2026
Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)Photo by OpenMarkets (@OpenMarketsAI)
Early Access to the OpenMarkets API is open. One feed. Every venue. Real-time, agent-native.
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Updated Money x Movement, World Series Game 5. At 3:20pm, Rays had 61% of the open orders. Now they have 42%, right at the even split. Open orders on the Brewers went from $2.3M to $7.0M. The price ticked toward the Rays, 42% to 44%.
Rays ML price hasn't moved all day. The open orders have. At noon, the Rays had 49% of the open orders on Game 5. Now they have 61%, while their price sits at 42%. Across OpenMarkets venues.
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ORDER BOOKS AHEAD OF BREWERS-RAYS WORLD SERIES GAME 5 👀 The best Rays number out appears to be +133 @Polymarket...but after fees, $100 there wins $125. A +130 @ProphetX or +131 at @4castersbet wins $129 after fees.
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Every prediction market is its own silo. Its own prices, its own fees, its own fine print. Four venues list the Timberwolves at -156. After fees, $100 wins $60 at one and $64 at another. Comparing odds isn't enough. You have to compare what they pay after fees.
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Rays ML price hasn't moved all day. The open orders have. At noon, the Rays had 49% of the open orders on Game 5. Now they have 61%, while their price sits at 42%. Across OpenMarkets venues.
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Rays need a win tonight to force Game 6. Four venues list them at +144. After fees, that same +144 pays anywhere from $134 to $144 on a $100 bet. Shop the price after fees, not the one on the screen.
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GreenBook is live. Powered by OpenMarkets. Connect your accounts once. See every price side by side. Trade the best one without leaving. For free.
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Stop comparing prices before fees. OpenMarkets shows every venue after. Best listed Hurricanes ML price tonight: −170. After fees: −181 to −183. Real best? −174.
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Money x Movement: World Series Game 4. Since losing Game 3, the Rays have moved from 43% to 47% to force a Game 5. At 47% to win, they have 53% of the open orders across OpenMarkets venues.
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Same Cowboys-Eagles bets, same game. Only difference? Where they were placed. Trade every venue's price, after fees, in one place. Stop leaving money on the table!
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Eagles-Cowboys Money x Movement update, an hour before kick. Price hasn't moved. The open orders have. Open orders on the Eagles: $7.3M ➡️ $11.9M Open orders on the Cowboys: $19.3M ➡️ $14.6M
New: Money x Movement. Two things, added up across OpenMarkets venues: Where the price is going, and where open orders are. Cowboys-Eagles MNF, as of 2:49 PM ET: Price: Cowboys 64% last Monday, 67% now. Open orders: $19.3M on Cowboys | $7.3M on Eagles.
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15 favorites on sports equinox night. If they all win (would be nuts), that's $946 profit or $872. Same bets, same games. The only difference is where you place them.
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On sports equinox night, the prediction market fragmentation problem gets loud. 5 leagues. 30,930 prices, spread across 9 venues that don't talk to each other. Same games, same bets, nine separate islands. OpenMarkets connects them in one place.
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New: Money x Movement. Two things, added up across OpenMarkets venues: Where the price is going, and where open orders are. Cowboys-Eagles MNF, as of 2:49 PM ET: Price: Cowboys 64% last Monday, 67% now. Open orders: $19.3M on Cowboys | $7.3M on Eagles.
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Open orders are bets people have posted on a team, waiting for someone to take the other side. We count only orders near the current price, then add them up across venues.
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You can be right on every game and still leave units on the table. Prices are split across venues, and so is your money. OpenMarkets brings it all together.
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11 NBA games: Best ML and spread after fees, across every venue. The shop gap column: On every favorite, the best venue beats the worst by $2-$8 on a $100 bet. On the dogs, it's bigger: $26 on the Clippers, $20 on the Mavericks, $19 on the Wizards, $18 on the Kings.
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The big CFB tilts are split. The leans are in the games nobody's talking about. Across every venue's order book: 77% of waiting money backs Iowa −7.5 at Minnesota 73% backs BYU −7.5 at UCF 79% backs Kansas +2.5 vs. Baylor
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