120-Day BTC 24h Polymarket Data Download
Download 120 days of BTC 24h Polymarket data for local analysis, Parquet workflows, research, and reproducible strategy tests.
120-day BTC 24h Polymarket data download gives traders and researchers a rolling multi-month sample of Bitcoin Up/Down markets. PolyHistorical captures full-depth order book snapshots at 300ms granularity, so data export can account for spread, liquidity, and the prices that were available at each point in a market.
A complete 120-day calendar window can contain up to roughly 120 scheduled 24h windows before launch dates, feed gaps, or unavailable markets are considered. Always measure the returned coverage instead of assuming every possible window exists.
Why Use a 120-Day Window?
Daily BTC contracts preserve a full market lifecycle for studying session effects, sustained moves, and settlement behavior. A 120-day lookback is long enough to compare multiple volatility and liquidity regimes while remaining practical for rolling research and repeated model validation.
Build a Reproducible 120-Day Download
For a local BTC 24h research set, export the raw snapshots before calculating features. Partition files by market date and identifier so a failed job can resume cleanly and individual contracts can be audited later.
- Keep raw prices and sizes separate from derived midpoint or imbalance columns.
- Use UTC timestamps and preserve the original market and token identifiers.
- Write columnar files for scans, plus a small manifest with row counts and coverage.
- Record the retrieval date and filters alongside every export.
Quality Checks Before Analysis
Historical depth is only useful when the sample is auditable. Check that timestamps are ordered, both outcome tokens are present, price levels are valid, and market resolution is known. Flag snapshot gaps instead of forward-filling across them, because invented book states can create fills that never existed.
For strategy work, avoid using midpoint as an execution price. A midpoint is descriptive; an order must interact with the bid or ask and may consume several levels when the requested size is larger than top-of-book liquidity.
120 Days vs 90 Days
Choose 120 days when that window matches your subscription, compute budget, or validation schedule. The 90-day BTC 24h data download page covers the longer alternative. Using both as rolling horizons can show whether a result is stable or overly dependent on the most recent regime.