Tick-by-tick trades and L2 order-book depth for 10 World Series & MLB Playoffs series on Kalshi — World Series winner (KXMLB), AL and NL Championship, playoff qualifiers, playoff matchups, best record, longest winning streak. 1,663 series-days covering March 2026 – September 2026; 5.4K trades · $17.8K turnover in the 30 days to 2026-09-02. Sold as day bundles from €1.
World Series winner, AL/NL pennants, playoff qualifiers and matchups, best and worst records, win/loss streaks.
Every series below is archived at full feed resolution — each contract file carries every trade print (price, size, side) and Level-2 order-book updates in one normalized, zstd-compressed schema. A series-day bundle holds all contracts of the series for one UTC day.
Ranked by USD turnover from our own daily statistics — the series a market maker or bot builder should start with.
| # | Series | Venue | Trades (30d) | Turnover (30d) | Days | |
|---|---|---|---|---|---|---|
| 1 | Teams in MLB Finals | Kalshi | 5,368 | $17.8K | 28 | Buy days |
Trades and USD turnover summed over every contract of the series, from the recorded tick data; 30 days to 2026-09-02. Series without statistics in the window are omitted.
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| World Series | Kalshi | event | 183 | March 2026 – September 2026 | 3.05 GB | €1 | Buy days |
| Pro Baseball Playoff Qualifiers | Kalshi | annual | 183 | March 2026 – September 2026 | 1.17 GB | €1 | Buy days |
| Teams in MLB Finals | Kalshi | event | 183 | March 2026 – September 2026 | 1.10 GB | €1 | Buy days |
| MLB American League Championship | Kalshi | annual | 183 | March 2026 – September 2026 | 746 MB | €1 | Buy days |
| MLB National League Championship | Kalshi | annual | 183 | March 2026 – September 2026 | 522 MB | €1 | Buy days |
| Pro Baseball Best Record (KXMLBBESTRECORD) | Kalshi | annual | 183 | March 2026 – September 2026 | 245 MB | €1 | Buy days |
| Pro Baseball Best Record (KXMLBWORSTRECORD) | Kalshi | annual | 183 | March 2026 – September 2026 | 220 MB | €1 | Buy days |
| Pro Baseball Playoff Matchups | Kalshi | event | 16 | August 2026 – September 2026 | 199 MB | €1 | Buy days |
| Longest Winning Streak | Kalshi | event | 183 | March 2026 – September 2026 | 180 MB | €1 | Buy days |
| Longest Losing Streak | Kalshi | event | 183 | March 2026 – September 2026 | 96.0 MB | €1 | Buy days |
Yes — KXMLB is the season-long World Series winner series; AL/NL Championship, playoff qualifiers, playoff matchups, best/worst record and streak series sit beside it. Each day of the season is one bundle day.
One purchase covers every contract of a series for one UTC day — tick-by-tick trades plus Level-2 order-book updates per contract — typically €1 per series-day.
Coverage runs March 2026 – September 2026 — 1,663 series-days across 10 series on Kalshi. Each series page lists its exact span.
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Kalshi records full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
Typically €1 per series-day bundle — every contract of the series for that UTC day, with invoice on checkout. Pick days in the shop calendar.