Prediction Market To Spor

👥 102 users

📦 v1.2.0

💾 13.15KiB

📅 2025-10-06

View on Chrome Web Store

Chrome will indicate if you already have this installed.

Overview

Chrome extension that appends sportsbook-style odds next to prediction market prices on Polymarket and Kalshi. Shows Decimal, American, and Fractional. Optional fee adjustment (in percentage points) to model effective probability before conversion.

- Finds text like `55%` or `$0.55` and computes:
- Decimal: 1 / p
- American: if p >= 0.5 → -(p/(1-p))*100, else ((1-p)/p)*100
- Fractional: (1 - p) / p as a simplified fraction (approx.)
- Works on SPA updates using a `MutationObserver`.
- Avoids duplicate badges via a data-attribute.