USL Championship is a sports series on Kalshi, with markets like “Will Colorado Springs Switchbacks FC win the USL Championship?”. The Kalshi Eye archive lists 25 of its markets and has 13 days of daily Parquet files from October 12, 2026 to October 24, 2026 (851 KB), with every order book change and trade.

Venue: Kalshi, series KXUSL
Category: Sports
Markets: 25 (0 settled, 25 open)
Files: 13 days, October 12, 2026 to October 24, 2026, 851 KB, 149,450 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars), Trades

Open USL Championship in Markets to see every day and market, then export the days you need. Free sample files of each dataset are on the Kalshi data page.

Reading the files

Every KXUSL trade on October 24, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-24/series=KXUSL/trades-KXUSL-2026-10-24.parquet'
ORDER BY ts_recv;

To test a strategy on this series, see How to backtest Kalshi markets.

Related Kalshi series

USL Championship Game (KXUSLGAME): 188 markets, 13 days of files
College Football Conference Championship Matchup (KXNCAAFCONFMATCHUP): 865 markets, 13 days of files
NFL Championship Outcome (KXNFLSBOUTCOME): 512 markets, 11 days of files
EFL Championship Total (KXEFLCHAMPIONSHIPTOTAL): 342 markets, 12 days of files
EFL Championship Spread (KXEFLCHAMPIONSHIPSPREAD): 256 markets, 12 days of files
Steel Bridge National Championship (KXSTEELBRIDGE): 100 markets, 13 days of files

Figures through October 24, 2026. All Kalshi series with pages are listed on Kalshi series.