Prediction market tools
Calculators and trackers for pricing, sizing, and record-keeping. Open any tool and start using it immediately, with no account wall before first use.
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Open a calculator and use the preloaded sample spot immediately.
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Every tool runs free, with no account wall before first use.
Best For
Choose by job: price conversion, EV sizing, tracking, or alert review.
Best for: Biggest movers on Polymarket, right now
Polymarket Scanner
Live scanner of the top 50 active Polymarket markets ranked by biggest 24-hour price move. Category filters, search, one-click trade-through. No account required.
Use tool NewBest for: Line movement + cross-market anomalies
Line Intelligence
Dashboard for line movement, Kalshi vs Polymarket anomalies, insider signals, and ranked scenarios when you want one place to review what changed first.
Use tool PopularBest for: Quick bet sizing and edge checks
EV Calculator
Calculate expected value for any bet. Input your estimated probability and the market odds to see if a trade is +EV, the edge percentage, and optimal Kelly criterion bet sizing.
Use tool NewBest for: Tracking results over time
Bet Tracker
Log your bets, track win/loss records, and calculate ROI and profit over time. All data stored locally in your browser — no signup required.
Use toolBest for: Cross-format price comparison
Odds Converter
Convert between decimal, American, fractional, and implied probability formats instantly. Essential for comparing odds across prediction markets and sportsbooks.
Use toolBest for: Cross-border bankroll planning
Currency Calculator
Real-time currency converter with exchange rate analysis. Convert USD, KRW, CNY and more for cross-border prediction market trading.
Use toolNeed more than calculators?
EVSignals automates +EV scanning across 500+ prediction markets and sportsbooks. Data notebooks, real-time alerts, and a full API.