Pro Baseball Silver Slugger, tick by tick.
Kalshi series KXMLBSS: order book and trades, 2026-09-27 → 2026-10-23.

What a KXMLBSS day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 27 days on disk.

KXMLBSS markets

The 12 closing nearest to now, from Kalshi's daily market list. Each is a row key (market_ticker) in every table, captured from the day it opens until it settles.

Coverage notes for KXMLBSS

• First day on disk: 2026-09-27. That is the day our Kalshi capture began, not the series' launch. New days are added daily.
• Trades before 2026-09-27. Kalshi's historical API has no tick-level order book, so earlier KXMLBSS trades are in the whole-exchange trades history (from 2021-06-30, one file a day): filter market_ticker to this series' markets, which start with KXMLBSS-.
• The first day starts at 11:00 UTC. Our capture began at 11:00 UTC on 27 September 2026: 13 hours that day, not 24, and no CF Benchmarks index file (that capture starts on the 28th).
• A book-quality dip on 2026-09-29. During a pipeline cutover 10,255 exchange snapshots disagreed with the rebuilt book (41 to 1,378 on every other day) and 16,678 negative levels were clamped to zero. The book resynchronises at every exchange snapshot; trades and ticker are unaffected.
• Every bundle ships a README with the schemas and, per day, how often the rebuilt book matched the exchange's own snapshots, for your exact range.

Pricing

A month of KXMLBSS, every table, is about 16 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXMLBSS if you like, at full book depth; L10 ($49/mo) carries every series' book at 10 levels and L25 ($99/mo) the full 25-level book. Each includes 7 days before you join and every day after. Any free account can pull 2026-10-07, any series, up to 1.0 GB.

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