Order Book & Level 2 Data
Buy and sell order book & level 2 data data. Bid/ask depth, queue position, cancellation patterns — market microstructure AI needs real order book snapshots.
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Find Me This Data →Overview
What Is Order Book & Level 2 Data?
Level 2 (L2) market data is a superset of Level 1 data that reveals the full depth of buy and sell orders across multiple price levels, typically 5–10 levels above and below the current market price. Unlike Level 1, which shows only the best bid and ask prices, L2 displays aggregated bid and ask volumes at each price level, showing who is willing to buy or sell and at what prices. This data updates in real-time as orders enter or leave the book, providing traders and market makers with critical insights into market liquidity and supply-demand dynamics. For quantitative analysts and high-frequency trading systems, L2 data captures essential market microstructure including order flow, queue position, and cancellation patterns that inform prediction models and trading strategies.
Market Data
5–10 price levels above & below mid
Typical L2 Depth Coverage
Source: Bookmap
Millisecond-level snapshots
High-Frequency Reconstruction Granularity
Source: Frontiers (LiT Research)
Several terabytes in binary format
US Equities L2 Data Volume (Monthly)
Source: Databento
L1 feed $500/mo; L2 feed $2,500/mo (IEX)
Example Market Data Cost Difference
Source: Databento
Who Uses This Data
What AI models do with it.do with it.
Day Traders & Short-Term Traders
Analyze real-time order book depth to understand the 'why' behind price movements, identify support/resistance levels, and spot fake orders or walls before they execute.
Quantitative Analysts & ML Models
Feed L2 snapshots (price and volume features across 20+ levels) into transformer and deep learning models to predict mid-price movements and optimize trade execution.
Market Makers & Liquidity Providers
Monitor aggregated order flow, detect hidden liquidity (icebergs), track absorption patterns, and adjust inventory and pricing strategies based on real execution data.
Cryptocurrency & Crypto Derivatives Traders
Access high-frequency L2 data from exchanges like Binance to reconstruct the full order book and identify breakouts, spoofing, and real demand signals.
What Can You Earn?
What it's worth.worth.
Subscription Data Feed
$2,500–$10,000+ per month
Premium real-time L2 feeds (e.g., IEX DEEP $2,500/mo). Cost varies by venue, asset class, and distribution model.
Historical L2 Data Packages
Varies
Pricing depends on duration, granularity (tick vs. snapshot), number of symbols, and compression format. Terabyte-scale datasets typically require custom licensing.
Reseller / Data Redistribution
Varies
Margin and pricing structure depend on agreement with primary data vendor and end-customer tier.
What Buyers Expect
What makes it valuable.valuable.
Real-Time Accuracy & Low Latency
Millisecond-level synchronization with exchange timestamps; strict adherence to sequential order-book reconstruction to ensure bid-ask depth reflects true market state.
Complete Depth Capture
Full order book visibility (at least top 20 levels bid/ask for crypto; 5–10+ levels for equities) with all fills, cancellations, and order updates recorded, not just top-of-book.
Execution & Trade Records
Distinction between passive limit orders and aggressive market orders; capture of actual fills and volume absorption to detect real trades vs. spoofing or layering.
Historical Replay & Auditability
Timestamped snapshots enabling replay and backtest reconstruction; full provenance of order flows, cancellations, and price evolution for research and compliance.
Efficient Storage & Portability
Binary format or standardized compression (Parquet); support for time-series databases (e.g., QuestDB, InfluxDB) to minimize storage footprint and enable SQL-based analysis.
Companies Active Here
Who's buying.buying.
Provide high-frequency L2 order book data to quants and traders; reconstruct full order book at millisecond intervals for AI model training.
Licensed data provider of L2 feeds (DEEP @ $2,500/mo); distribute real-time and historical market depth to institutional traders and quant firms.
Microstructure data vendor specializing in sourcing, storing, and licensing historical L2 market data; address data size and licensing challenges for researchers and funds.
Order flow visualization and trading analysis platform; augment Level 2 data with execution records, absorption tracking, and historical heatmaps to detect real vs. fake orders.
FAQ
Common questions.questions.
What's the difference between Level 1 and Level 2 data?
Level 1 shows only the best bid and ask prices. Level 2 is a superset that reveals aggregated volumes across 5–10+ price levels on each side, exposing full market depth and liquidity distribution. L2 helps traders understand where real demand and supply exist.
Why is L2 data so expensive?
L2 data carries premium costs because exchanges limit distribution to maintain market structure control, and the volume is massive—a month of US equities L2 can exceed several terabytes. Real-time L2 feeds often cost 5× more than Level 1 (e.g., $2,500/mo vs. $500/mo).
How do AI and machine learning models use L2 data?
Models ingest L2 snapshots as multidimensional arrays—typically 80+ features capturing price and volume across top 20 levels on both bid and ask sides. Transformer and deep learning architectures use this to predict mid-price movements and identify market microstructure patterns.
What are the blind spots of Level 2 data?
Level 2 shows only intent (orders placed), not execution. Traders cannot see whether orders were real, filled, cancelled, or spoofed. Advanced tools like Bookmap add execution records and historical order flow to reveal actual market behavior and detect fake walls and iceberg orders.
Sell yourorder book & level 2data.
If your company generates order book & level 2 data, AI companies are actively looking for it. We handle pricing, compliance, and buyer matching.
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