Prediction Market Order Book Data
Understand prediction market order book data, including bid/ask ladders, spread, liquidity, depth, and historical replay workflows.
Prediction market order book data describes the live or historical bid and ask ladders for outcome tokens. For Polymarket-style markets, the order book is the execution layer behind displayed probabilities.
Core Fields
- Bid prices and bid sizes.
- Ask prices and ask sizes.
- Outcome token or market side.
- Timestamp for replay and alignment.
- Market metadata and resolution status.
Why It Matters
Order book data reveals spread, available size, price impact, liquidity imbalance, and execution quality. Those details are hidden when a dataset only stores midpoint prices or OHLC-style candles.
Analysis Workflows
| Workflow | Metric |
|---|---|
| Liquidity analysis | Depth within price bands and available size at best levels. |
| Backtesting | Realistic fill price, slippage, and partial-fill behavior. |
| Market making | Spread, queue depth, and inventory risk. |
| Research | Probability movement and market microstructure patterns. |