Polymarket Historical Data Availability: What Data Exists & How Far Back

One of the most common questions we get: "How much Polymarket historical data do you actually have?" Here's the complete breakdown of Polymarket historical data availability on PolyHistorical.

Markets Covered

How Far Back Does the Data Go?

PolyHistorical has been recording Polymarket order book data since the early days of the BTC Up/Down markets. The archive continues to grow every day as new snapshots are captured in real-time. The Pro plan gives you access to the full historical archive.

Free Tier vs Pro Access

Snapshot Granularity

Snapshots are captured at sub-second resolution — the highest available anywhere for Polymarket data. This means:

• A 5-minute market window can contain hundreds of snapshots
• You get enough resolution to study micro-structure, detect patterns, and simulate realistic execution
• All snapshots within an accessible market are included on every plan — no snapshot limits

Data Depth per Snapshot

Each snapshot includes price data by default. With include_orderbook=true, you also get:

• Full bid ladder for Up and Down outcomes — every price level and size
• Full ask ladder for Up and Down outcomes — every price level and size
• Coin price at snapshot time
• Up and Down outcome prices (0-1)

Free Access

Start with the free Starter plan — no credit card required. Access recent BTC markets immediately. Upgrade to Pro at $11/month for full historical access to all markets.

Related Resources

• Polymarket Historical Data: Complete Guide
• Polymarket Historical Data API
• Download Historical Data