The live edge terminal for prediction markets.
MarketMaster scans thousands of markets across Kalshi and Polymarket in real time, models a fair value for each, and surfaces the mispriced ones — ranked by expected value, the second they appear.
See plans & pricing →An institutional toolkit, in your browser.
Everything you need to find, validate, and act on an edge — in one fast, unified terminal.
Opportunity scanner
Continuously ranks every tracked market by expected value, so the best opportunities float to the top automatically.
Expected-value engine
Each market gets a model-derived fair value and an EV edge — so you see why it's mispriced, not just that it moved.
Cross-platform arbitrage
Detects the same event priced differently on Kalshi and Polymarket and flags the spread.
Smart-money tracker
See $10k+ trades from sharp money the moment they hit — follow the whales across the market in one live feed.
Smart alerts PRO
Watchlist a market and get an email the instant price or edge crosses your threshold. No staring at screens.
Journal & analytics PRO
Auto-imports your real trades, tracks realized P&L, win rate and a skill rating. Know if your edge is real.
Zero to your first edge in three steps.
Sign up free & browse
Open the scanner instantly. Optionally link a read-only Kalshi key or Polymarket wallet to track your own trades.
Spot the edge
The scanner ranks markets by EV and flags arbs. Every edge shows price, modeled fair value, and the gap — with the exact side to buy.
Act & track
Trade on the venue you already use; MarketMaster records the result and grades your performance over time.
Start free. Upgrade when the edge pays for itself.
Use the scanner and analyzer free, forever. Pro unlocks alerts, the arbitrage feed, journal analytics, and the extension overlay. Full pricing & comparison →
- ✓Everything in Free
- ✓Unlimited smart alerts
- ✓Cross-platform arbitrage feed
- ✓Trade journal, P&L & analytics
- ✓Chrome extension overlay
Questions, answered.
Does MarketMaster guarantee I'll make money?+
No — and be skeptical of anything that does. MarketMaster is an information and analytics tool. It surfaces where markets may be mispriced and tracks your results honestly; it does not provide financial advice or guarantee returns. Prediction markets carry real risk of loss.
What do "expected value" and "fair value" mean?+
Fair value is our model's estimate of a market's true probability. The expected-value edge is the gap between that and the current price — a structured way to see which markets look mispriced.
Do you need my exchange password?+
Never. The journal uses a read-only Kalshi API key or your public Polymarket wallet address. We can't trade or move funds.
Is the free plan really free?+
Yes — free forever, with full scanner access and the analyzer. Pro adds alerts, the arbitrage feed, journal analytics, and the extension overlay.
Stop scrolling markets.
Start finding edges.
Join free in 30 seconds. Bring your edge to every prediction market you trade.
Start free — no card