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Your Algorithmic Edge on Polymarket — institutional-grade quantitative risk management for retail traders. You bought at 0.65. It is now 0.47. You tell yourself it will come back. If you trade on Polymarket, you know the next thirty minutes. You refresh the page. You open the order book. You check the news. You hover over "Sell" and close the tab instead. That hesitation is the problem. Not your entry. Not the market. The gap between the stop-loss you promised yourself and the stop-loss you actually execute. WHY STOP-LOSSES DO NOT STICK ON POLYMARKET Prediction markets punish emotion harder than almost anything else. Resolution is binary. Liquidity can vanish inside a single news cycle. A 60-cent share at noon can be a 30-cent share by dinner. - You do not have a broker forcing you out of losing positions - You do not have a built-in alert system tuned for retail traders - You do not have a UI that makes closing feel like the default - You do not have anyone watching your book while you are at work - You have hope, and hope is expensive Most traders end up with the same pattern. Small wins get taken early. Losing positions get held. Over enough trades, the math does not survive. This extension is built for that one problem, and only that problem. WHAT THIS EXTENSION DOES PolyQuant is a discipline layer that sits on top of your browser while you use Polymarket normally. You enter a position once. It watches the price. When your loss crosses a threshold you set in advance, it covers the Polymarket page with a full-screen red overlay and tells you to close. No account. No wallet connection. No trading on your behalf. Nothing leaves your machine. Here is what you get: Hard Stop-Loss Overlay — When a position crosses your stop-loss threshold (default -10%, adjustable from -1% to -50%), the live Polymarket page is covered by a red screen showing entry, current price, and P&L. The message is one line: "Stop hoping. Close position immediately." Trailing Stop Alert — The extension tracks the peak price of every position while you hold it. If the price retraces from that peak past your trailing threshold (default -5%), a yellow warning badge appears on the page. You keep the gains you already made. Run Zone and Kill Zone — The popup splits positions into two lists. Healthy positions sit in Run Zone. Anything near or past a stop threshold moves to Kill Zone. You open the extension and see what needs your attention in under a second. Background Price Polling — A service worker polls the public Polymarket Gamma API on your configured interval (default 30 seconds, range 10 to 300). Nothing depends on you keeping a tab open. Event-Aware Market Picker — Paste any Polymarket event URL. If the event contains multiple sub-markets (for example, different resolution dates on the same underlying question), the extension fetches all of them and lets you pick the exact one you are tracking. Detect from Page — If you are already on a Polymarket event page, one click auto-fills the market slug into the add-position form. You do not copy URLs around. HOW IT WORKS 1. Install the extension and open the popup 2. Set your stop-loss, trailing stop, and poll interval, or keep the defaults 3. After buying on Polymarket, click Add Position — fill in entry price, share count, and pick Yes or No 4. Walk away. The extension polls prices in the background 5. If a position breaches a threshold, a red or yellow screen appears on the Polymarket tab the moment you open it That is it. No dashboards to check. No reports to read. The tool only interrupts you when it needs to. WHY A RED OVERLAY INSTEAD OF A NOTIFICATION Desktop notifications are easy to dismiss. A small banner is easy to ignore. The problem was never that traders do not see their losses — it is that seeing is not the same as acting. A full-screen red overlay forces a decision. You cannot scroll past it. You cannot pretend you did not see the number. The UI stops asking nicely and starts making closing the easier option than hoping. This is the single most important design choice in the product. Everything else supports it. LOCAL HISTORY AND CONFIGURATION Every position you add is stored locally with its entry price, share count, and timestamp. The current price and peak price are updated automatically on each poll. Nothing is sent to any server. Stop-loss and trailing stop both accept values from -1% to -50%. Poll interval ranges from 10 to 300 seconds. You can change thresholds after a position is open, and the new rules apply on the next poll. Tapping a position card in the popup opens the corresponding Polymarket event in a new tab. No manual URL tracking. REAL SCENARIOS WHERE THIS HELPS The Overnight Position You bought Yes at 0.72 on a congressional vote expected next Tuesday. Tuesday arrives, the news shifts, the price drops to 0.63 in an hour. You are in a meeting. The overlay is waiting on your Polymarket tab when you get back. You close at 0.64 instead of watching it go to 0.45. The Ladder Trade You scaled into five different date-range sub-markets on the same event. Each has a different entry price. The extension tracks them independently — one can sit in Run Zone while another moves into Kill Zone. The Momentum Fade A regulatory deadline is seventy-two hours away. You bought at 0.55 expecting a rally into the print. The rally comes, the price peaks at 0.74, then starts retracing. At -5% from the peak, the trailing stop badge fires. You lock in the move instead of riding it back down to entry. The Weekend Gap News breaks Saturday afternoon. You are not at your desk. Monday morning, the overlay is the first thing you see when you open Polymarket. You do not spend twenty minutes trying to decide — the decision was already made when you set the threshold. The Doubt Trade You took a low-conviction position just to have exposure. It moves against you. Normally you would drift the stop down to give it room. The overlay does not let you renegotiate without opening Settings, logging the override, and seeing your own inconsistency in writing. The Cold-Start Trader You are new to Polymarket. You do not have a trading journal yet. The Run Zone and Kill Zone split teaches you, over weeks of use, which entry patterns survive and which do not. WHAT THIS EXTENSION DOES NOT DO It does not ask for your wallet private key or sign any on-chain transaction. It does not collect, transmit, or store any personal data on a remote server. It does not track your browsing outside of Polymarket pages. It does not execute trades on your behalf. Every buy and sell stays manual. The only permissions it uses: - storage — save your positions and risk thresholds in local browser storage - alarms — schedule background price checks at your configured interval - host access to polymarket.com — inject the overlay on the market page you are viewing - host access to gamma-api.polymarket.com — fetch public market prices That is the full list. No analytics. No crash reporting. No third-party scripts. All position data lives in chrome.storage.local and is wiped when you uninstall the extension. FREE TO USE The extension is free. All features are available from install. There is no account, no sign-up, no paywall, and no usage meter. Price data is fetched from the public Polymarket Gamma API, which has no access fee at normal polling intervals. THE MATH BEHIND THE TRIGGERS P&L percent = (current price − entry price) / entry price × 100 Stop-loss fires when P&L percent is less than or equal to your stopLossPercent setting. Peak drop percent = (current price − peak price) / peak price × 100 Trailing stop fires when the peak price has exceeded your entry AND peak drop percent is less than or equal to your trailingStopPercent setting. No smoothing. No weighted averages. No hidden hysteresis. The numbers on the overlay are the numbers in the code. WHO THIS IS FOR - Polymarket traders who already have a position-sizing and risk rule but struggle to execute under pressure - Part-time traders who cannot monitor the order book continuously through the work day - Traders who scale into multiple sub-markets on the same event and need per-position tracking - Anyone who has bought a prediction market position and held it too long at least once Not built for: professional market makers, API-driven automated traders, or anyone looking for signal generation or price prediction. This is a discipline tool, not an alpha tool. GETTING STARTED Install the extension, open the popup, click Add Position, paste a market URL. The first red screen typically appears within minutes of your next losing trade. No account. No sign-up. No credit card. Just the stop-loss you already promised yourself.