PolySensei is a free Chrome extension designed specifically for the Polymarket prediction market, aiming to provide traders with professional-grade real-time data signals. It does not replace Polymarket, but seamlessly integrates into existing trading pages, overlaying key information such as whale fund flows, smart money records, real slippage, fair value, and live scores within the user's familiar interface, allowing traders to see market dynamics beyond price.
Main capabilities include:
- Whale fund flows: Track large buys and sells in real time and aggregate them, spotting capital movements before price changes.
- Smart money: Score the top holders of each outcome based on historical win rates, determining whether professional traders are on your side.
- Real slippage and fair value: Show the real execution price, slippage, exact payout, and Kelly optimal bet size before you click buy.
- External data: Display live scores, Vegas odds with the vig removed, and cryptocurrency and stock data alongside prices.
- Order book depth: Show the full depth of buyers and sellers, mark order walls, and display real-time buying and selling pressure.
- Full market scan: Scan the entire Polymarket for mispricings, whale activity, and UMA disputes, with filtering support.
- Other signals: Including fair value and edge, overpriced odds radar, real-time profit and loss, holder concentration, price history, settlement radar, one-click follow of top holders, and more.
How to use:
- Add the extension from the Chrome Web Store with one click, with no account, registration, or configuration required.
- Open any Polymarket market page, and PolySensei will automatically detect and load, adapting to the user's light or dark theme.
- View each signal directly on the page and trade via one-click buy, while earning Sensei Points to increase your rank (in-app status and privileges only, with no cash value).
Use cases: Suitable for users trading prediction markets on Polymarket, especially traders who want a professional data advantage, avoid slippage, and identify smart money movements and mispricings.
Limitations and notes:
- PolySensei is completely free, with no subscription and no added trading fees. Its revenue comes from Polymarket's builder program, sharing in routed trading volume, at zero extra cost to users.
- Non-custodial: It never touches user funds or private keys, and all orders are signed in the user's own wallet.
- No account, registration, or email required.
- Supports any wallet the user already uses on Polymarket.
- All signals are calculated in real time based on public Polymarket and on-chain data, with no black box or fabricated numbers.
- The extension's performance is optimized, with signals prefetched and rendered instantly, so it will not slow down Polymarket.
- Currently only a Chrome extension is available; other platforms are not yet supported.
