Structural price differences between Polymarket and traditional pendant sources. Durable focus — spreads that hold for ≥ 2 weeks, not millisecond arbitrage.
The scanner anchors on Polymarket and looks for a pendant in traditional markets per qualified question — currently active: macro releases (Finnhub Economic Calendar) and FOMC rates (EODHD Fed Funds Futures, CME methodology computed in-house). Other domains are classified but have no pendant adapter in V1.
The traffic light combines five dimensions: liquidity, Polymarket bid-ask spread, classifier match-class, post-cost spread size, plus persistence — how long has the spread been open? Daily-flicker pattern lands on 🔴, ≥ 7 days stable green on 🟢.
Note: indicative display, not a trade recommendation. Structural mispricings can be explained by resolution-source differences, asymmetric liquidity, or information not reflected in the pendant source.