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kalshi historical data / politics / KXARREST
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ARRESTS, tick by tick.
Kalshi series KXARREST: order book and trades, 2026-09-27 → 2026-10-22.

The order-book and trade history of Kalshi's ARRESTS series (a one-off event): top of book on every change, the 25-level book on every change in YES terms, every trade with the taker's side, and Kalshi's own ticker, with exchange timestamps to the millisecond. Captured by us from Kalshi's websocket on two independent legs and checked against the exchange's own book snapshots.

26 days2026-09-27 → 2026-10-22 · every day since its first · ~2 MB per day · 50 MB on disk · 25 open markets
pull KXARREST days →schemapricing

What a KXARREST day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 26 days on disk.

Top of book (every change)kalshi_l1

Best YES bid and ask with sizes and the spread, one row whenever either changed, derived tick by tick from the rebuilt book: not Kalshi's conflated ticker.

~108 kB per KXARREST day
Order book, 25 levels, every changekalshi_l2

The whole ladder after every book event, in YES terms (the NO bids become the asks, at their sizes), 25 levels a side: wide columns bid_px_1 … ask_sz_25, plus the exchange's own hourly snapshots. Each row is self-contained, so you can start reading mid-day.

~2 MB per KXARREST day
Tradeskalshi_trades

Every trade: YES and NO price, size in contracts, the taker's side, block-trade flag, trade id.

~25 kB per KXARREST day
Kalshi ticker (~1 s)kalshi_ticker

Kalshi's own ticker feed, about one update a second per market: last price, YES bid/ask with sizes, cumulative volume and open interest in contracts and dollars.

~97 kB per KXARREST day

KXARREST 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.

Will Anthony Fauci be arrested before Jan 2027?: Anthony FauciKXARREST-27JAN-AFAUcloses 2027-01-01 04:59 UTC
Will Adam Schiff be arrested before Jan 2027?: Adam SchiffKXARREST-27JAN-ASCHcloses 2027-01-01 04:59 UTC
Will Bill Clinton be arrested before Jan 2027?: Bill ClintonKXARREST-27JAN-BCLINcloses 2027-01-01 04:59 UTC
Will Brandon Johnson be arrested before Jan 2027?: Brandon JohnsonKXARREST-27JAN-BJOHcloses 2027-01-01 04:59 UTC
Will Benjamin Netanyahu be arrested before Jan 2027?: Benjamin NetanyahuKXARREST-27JAN-BNETcloses 2027-01-01 04:59 UTC
Will Barack Obama be arrested before Jan 2027?: Barack ObamaKXARREST-27JAN-BOMcloses 2027-01-01 04:59 UTC
Will Candace Owens be arrested before Jan 2027?: Candace OwensKXARREST-27JAN-COWEcloses 2027-01-01 04:59 UTC
Will Gavin Newsom be arrested before Jan 2027?: Gavin NewsomKXARREST-27JAN-GNEWcloses 2027-01-01 04:59 UTC
Will Hillary Clinton be arrested before Jan 2027?: Hillary ClintonKXARREST-27JAN-HCLINcloses 2027-01-01 04:59 UTC
Will Ilhan Omar be arrested before Jan 2027?: Ilhan OmarKXARREST-27JAN-IOMAcloses 2027-01-01 04:59 UTC
Will Joe Biden be arrested before Jan 2027?: Joe BidenKXARREST-27JAN-JBIDcloses 2027-01-01 04:59 UTC
Will John Brennan be arrested before Jan 2027?: John BrennanKXARREST-27JAN-JBREcloses 2027-01-01 04:59 UTC

Coverage notes for KXARREST

  • 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 KXARREST 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 KXARREST-.
  • 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 KXARREST, every table, is about 57 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXARREST 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.

Starter: KXARREST at full depth →L10: every series at 10 levelsL25: every series, 25 levelsfree sample day

Other politics series on Kalshi

Trump approval ratingVoteHub GCBWho will be charged with a federal crimeWho will leave the Trump administrationPresident RCP approval rating this weekBills become law this year?What countries will Trump visit this year?Mar-a-Lago tripsEpstein listNumber of Trump Truth Social posts this week?Which states will Trump visit this year?Will Trump do anything today?Who will Trump meet this year?Traffic through the Strait of HormuzNext UN Secretary-GeneralWho will Trump pardon?Traffic through the Bab al-Mandab StraitTrump pardonsPresident impeachedNobel Peace Prize… the whole venue