Description from extension meta
Append sportsbook-style odds next to prediction market prices (Decimal, American, Fractional) with optional fee adjustment.
Image from store
Description from store
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.
Statistics
Installs
1
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Rating
0.0 (0 votes)
Last update / version
2025-09-10 / 1.0.0
Listing languages
en