# Changelog of Prediction Markets API — Kalshi & Polymarket Odds (`lergassy/prediction-markets-api`) Actor

- **URL**: https://apify.com/lergassy/prediction-markets-api/changelog.md
- **Full Actor documentation**: https://apify.com/lergassy/prediction-markets-api.md

## Changelog

### 2026-10-14

- Kalshi probabilities now come from real prices: the bid/ask midpoint only when both sides of the book exist, otherwise the last trade; resolved markets show their result (100% or 0%) instead of a flat 50%.
- Resolved and paused Kalshi markets no longer appear in results unless "Include closed and resolved markets" is on.
- Events mode now follows "Sort by" (for example "Closing soonest") instead of always sorting by volume; event rows also carry 24-hour volume.

### 2026-10-02

- Default memory now adapts to your input: typical runs use less, very large market lists get more.

### 2026-10-01

- Fixed runs with a maximum cost stopping before the limit was actually reached.

### 2026-09-27

- Runs stop cleanly at your maximum cost instead of being aborted; nothing beyond your limit is written or charged.

### 2026-09-24

- Open Kalshi markets now come from Kalshi's own search, busiest first, so top-volume runs return the markets people actually trade today.
- Keyword search on Kalshi finds markets whose title does not spell the keyword (for example "BTC" markets for "bitcoin").
- Sorting by 24-hour volume no longer ranks markets with no trading today above the day's busiest ones.
- Compare mode: for head-to-head games, the Polymarket price is now read for the same team as the Kalshi contract.

### 2026-09-18

- New compare mode: pairs the same question on Kalshi and Polymarket and returns both probabilities, the gap in percentage points and the venue where YES is cheaper.
- Pairs require the distinguishing words to match, so different people or market types are no longer paired by mistake.

### 2026-09-04

- Initial release: Kalshi and Polymarket in one table with the same fields for both venues (probability, yes and no price, bid and ask, 24-hour move, volume, liquidity, close date, link); markets, events, search, price history and order book modes.