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Tick-level
crypto data.

Verified, normalized, free.
Historical L2/L4 books, trades, funding, liquidations and open interest for reproducible research.

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SIMULATED STREAMBTCUSDT · PERPETUALUTC 14:32:01.482
PRICE / EVENTSlast 90 seconds
67,842.10+0.18%
buysellevent 482,193
ASKSPRICESIZE
67,842.10mid0.50 bps
BIDSDEPTHSIZE
click a level · rebuilt from L2/L4 updatesfreshness 0.002 sec

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Order books

L2 snapshots and deltas, rebuildable tick by tick.

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Trades

Every fill on the tape, normalized across venues.

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Liquidations

Forced-close events for stress and regime analysis.

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Python SDK

pip install and pull DataFrames in one line.

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Options intelligence

Gamma levels
anchored to spot.

Positive and negative exposure share one price axis. The zero-gamma flip and current spot stay visible as the distribution moves.

EXPIRY
SPOT$67,842
ZERO GAMMA$66,500
CALL WALL$70,000
PUT WALL$64,000
positive GEXnegative GEX
70,00069,00068,00067,00066,00065,00064,000
0 GEX
SPOT · $67,842
−$1.0B−$0.5B0+$0.5B+$1.0B
Calls and puts aggregated by strike · illustrative snapshotupdated 14:32:01 UTC
Unified schema across every venue

Every venue that
matters to your book.

Centralized exchanges, on-chain perps and prediction markets, collected side by side on the same clock.

9exchanges
15markets
6data types
$0your cost
Hyperliquid
connected
perpetuals61ms p95
Lighter
connected
perpetuals · spot46ms p95
Polymarket
connected
prediction markets32ms p95
Binance
connected
spot · USDⓈ-M38ms p95
Bybit
connected
linear derivatives72ms p95
OKX
connected
perpetual swaps54ms p95
Aster · Bitget · Kraken · BitMEX · more coming soon
01 / Unified schema

Different venues.
Same event stream.

Raw feeds in. One row out. Build a book, replay a trade, or start a backtest from the same shape.

SOURCE FEEDS
Hyperliquid
perpsL2 / L4
Lighter
perpsL2 / trades
Polymarket
marketstrades / odds
ARETHEL EVENT✓ VALIDATED
orderbook.updateBTCUSDT14:32:01.482
BTCUSDTsymbol
ASKside
67,842.10price
2.682size
sequence 11454752532647latency 0.8 msvenue HL
typed · timestamped · replayable
ONE ROW, MANY USESTurn the same event into a backtest.
01—03
rawcleanbookreplaybacktest
01 store02 replay03 measure
CANONICAL FIELDSReadable at a glance.
symbolevent_timesidepricesizesequence
Each venue maps to this shape.→Every tool reads it.

THE PLATFORM

Unified research terminal

A point-in-time backtest, with fees, slippage and equity in one view.

Every market. One orbit.

03 / Free

One plan.
Everything included.

Free while we grow. No usage caps at launch, no credit card and no hidden tiers.

Order bookL2/L4 tick-by-tick Snapshots plus every update
UpdatesHourly New files published at :01 UTC
FormatParquet Columnar, typed, compressed
Access$0.00 No usage caps during launch
No credit cardFree tier stays foreverREST + Python included
ARETHEL
LAUNCH ACCESS · MONTHLY
L2/L4 order book snapshots$0.00
Every order book update$0.00
Tick trades$0.00
Funding & mark price$0.00
Liquidations$0.00
Open interest$0.00
Hourly Parquet files$0.00
REST API + Python SDK$0.00
Bulk downloads$0.00
Usage capsnone
Credit cardnot needed
TOTAL / MONTH$0.00
THANK YOU FOR BUILDING WITH ARETHEL
Historical data for reproducible research

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market data.