The Terminal For Prediction Markets.
ArbEx automatically matches related markets across major prediction platforms, showing cross-venue liquidity, synthetic legs, and real-time arbitrage opportunities all in one terminal.
Everything You Need to Trade Prediction Markets
Purpose built workflows for identifying mispricings, comparing venues, and executing profitable strategies across the prediction market ecosystem.
Matched Markets
ArbEx automatically identifies and links equivalent contracts across Polymarket, Kalshi, PredictIt, and ForecastEx, consolidating them into unified ArbEx tickers. This lets you compare pricing, spreads, and synthetic legs without the manual overhead. Or, match your own and track them right on the site.
2028 US Election?
Smart Order Tickets & Calculators
Build cross venue trades using live pricing. Choose buy and sell legs across markets, preview synthetic positions, and model ROI, payout, and execution edge, all updating in real time.
Arbitrage Calculator
2028 US Presidential Election Winner
Will JD Vance win?
Venue Summary
Side: YES| Venue | Y.Bid | Y.Ask | N.Bid | N.Ask |
|---|---|---|---|---|
KalshiKalshi | 0.410 | 0.429 | 0.571 | 0.590 |
PolyPolymarket | 0.401 | 0.419 | 0.581 | 0.599 |
FcstExForecastEx | 0.394 | 0.412 | 0.588 | 0.606 |
Trade Structure
Defaults to best arbPayout Breakdown
Intelligent Watchlists & Alerts
Add any ArbEx ticker to your watchlist and receive text or email alerts for price movements or spread changes, whether within a single venue or across multiple exchanges.
Live cross-venue quotes for your pinned ArbEx tickers.
| Ticker | Venue | Last | Yes Bid | Yes Ask | No Bid | No Ask |
|---|---|---|---|---|---|---|
| PRES2028JVAN | Kalshi | 0.42 | 0.41 | 0.42 | 0.57 | 0.58 |
| PRES2028JVAN | Polymarket | 0.400 | 0.392 | 0.408 | 0.592 | 0.608 |
| PRES2028JVAN | PredictIt | 0.406 | 0.397 | 0.415 | 0.585 | 0.603 |
| PRES2028GNEW | Kalshi | 0.302 | 0.294 | 0.309 | 0.691 | 0.706 |
| PRES2028GNEW | Polymarket | 0.347 | 0.338 | 0.357 | 0.643 | 0.662 |
| PRES2028GNEW | PredictIt | 0.318 | 0.311 | 0.325 | 0.675 | 0.689 |
| LLMTOP2025GOOG | Kalshi | 0.847 | 0.839 | 0.855 | 0.145 | 0.161 |
| LLMTOP2025GOOG | Polymarket | 0.875 | 0.870 | 0.881 | 0.119 | 0.130 |
| LLMTOP2025OPEN | Kalshi | 0.206 | 0.197 | 0.215 | 0.785 | 0.803 |
| LLMTOP2025OPEN | Polymarket | 0.244 | 0.239 | 0.249 | 0.751 | 0.761 |
Institutional-Grade Infrastructure for Prediction Markets.
ArbEx introduces the missing infrastructure prediction markets have lacked: unified liquidity views, synthetic contracts, and professional RV trading modules. Built for active traders who need real pricing, real structure, and real workflows.
Cross-Venue Order Book
ArbEx merges live bids and asks from multiple markets into a unified depth-of-book display, letting you see where liquidity is concentrated and how spreads evolve across platforms in real time.
Level 2 · Cross-Venue
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