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PredictMirror is a Polymarket paper trading simulator that lets you practice on every market without putting a single dollar at risk. The extension overlays a trading panel directly on any Polymarket event page, pulling live prices from the real order book so your simulated trades reflect exactly what you would have paid or received on the actual market. Start with all the virtual capital you need, no wallet or signup required. Place BUY and SELL trades on any outcome across sports, crypto, politics, culture, and esports markets. PredictMirror calculates fees and slippage using Polymarket's exact formula, so the numbers match what you would see on the real platform down to the cent.
136 E snd St, WY 82601, Casper, United States
3.7
1 review
No history of asking for reviews
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I was skeptical when I tried PredictMirror because it is a new tool with not a lot of users, but I was very surprised when I saw it in action. Simple to use, great design and fairly accurate. I've tried a few prediction market simulators, but PredictMirror is by far the best option as they don't even ask you to create an account.
The best part is that it is completely free so I thought they deserve a shout out. Great work!
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