Polymarket Order Book History: Past Bid/Ask Depth by Market
Explore Polymarket order book history for resolved BTC, ETH, and SOL Up/Down markets with past bid/ask depth and market-resolution metadata.
Polymarket order book history shows how market depth changed over time. It answers questions that price history alone cannot answer: where was liquidity placed, how wide was the spread, how quickly did depth disappear, and what fill price was realistically available?
What You Can Look Up
- Past bid and ask levels for UP and DOWN tokens
- Snapshot-by-snapshot spread changes
- Depth near midpoint before and after large moves
- Resolved market metadata and final winner
- BTC, ETH, and SOL reference-price context
Order Book History vs Price History
| Question | Price history | Order book history |
|---|---|---|
| What was the displayed price? | Yes | Yes |
| Could I buy size at that price? | No | Yes |
| How much slippage would I pay? | No | Yes |
| Was the market liquid? | Partial | Yes |
How to Access History
Use the markets API to identify the market, then fetch snapshots. Each snapshot can include the full order book, making it possible to reconstruct the book at any captured timestamp.