⏱ 1-Minute Summary This platform provides T-1 end-of-day (EOD) closing data only: a snapshot of US options and stock markets after each trading day closes. It's designed for mid-to-long-term options strategy backtesting (days to months), not for intraday, 0DTE, or earnings-event strategies. Use it for historical research, not as a live trading signal.
1. What This Data IS For
Because our data captures the daily closing snapshot, it is ideal for strategies with holding periods measured in days or weeks:
- 3-day swing trades: enter and exit based on daily closing prints
- 1-week positions: capture weekly theta decay and gamma exposure
- 1-month monthly rolls: classic monthly options selling strategies
- Multi-year portfolio analysis: evaluate risk metrics (Delta, Vega, Sharpe) across full market cycles
These timeframes align naturally with daily-frequency backtesting. You can evaluate how a strategy would have performed across years of closing prices without intraday noise.
Suitable Users
This platform is built for three types of users:
- Long-term options sellers (individual traders): monthly rolling covered calls, iron condors, calendar spreads. No reliance on intraday or earnings-event arbitrage; just monthly rolling theta returns over the long term.
- Finance students & independent researchers: 10 years of clean EOD data for volatility term structure theses and empirical research, without stitching together fragmented history from multiple platforms.
- Daily-frequency quantitative developers; overnight or daily rebalancing strategies without needing minute-level real-time data.
Suitable for Options Backtesting
Our backtesting engine is purpose-built for options strategies. All pre-built templates (covered calls, iron condors, calendar spreads, monthly rolling sellers) are designed around daily closing data. You get full Greeks, IV/HV tracking, and portfolio-level risk metrics across multi-year periods.
How We Differ from Competitors
Most options backtesting tools focus on real-time scanning, earnings events, and 0DTE intraday backtesting: feature-heavy and complex. OptionEOD takes the opposite approach: we stripped out all intraday data and event databases. Every byte of storage and compute is dedicated to 10 years of clean T-1 closing snapshots, purpose-built for long-term sellers and academic researchers.
2. What This Data Is NOT For
- Stock price trading backtesting. The platform is focused on options analytics. While stock price data is available as the underlying reference, the backtesting engine and performance reports are optimized for options combinations, not for pure stock trading simulations.
- Ultra-short-term / intraday strategies (1min, 5min, 15min). We do not provide any intraday tick data, real-time WebSocket feeds, or minute-level OHLC data.
- 0DTE options. Options with only hours left until expiration are extremely sensitive to intraday moves. With only one daily closing snapshot, 0DTE strategies cannot be meaningfully backtested here.
- Earnings event strategies. We do not maintain an earnings calendar, earnings surprise database, or earnings-related history. Earnings-driven IV crush and gaps occur intraday and are not captured by end-of-day snapshots.
- Macro / event-driven strategies (FOMC, product launches, etc.). We do not have databases for these catalysts; strategies relying on them fall outside our scope.
3. Strategy Quick Reference
| Strategy Type | Timeframe | Suitable? |
|---|---|---|
| Long-term options selling (monthly rolls) | Weeks to months | ✅ Yes |
| Covered calls, iron condors, calendar spreads | Days to weeks | ✅ Yes |
| Multi-day swing trades (3–10 days) | Days | ✅ Yes |
| Stock-only backtesting | Any | ❌ No |
| Intraday scalping (1min, 5min) | Minutes | ❌ No |
| 0DTE options | Hours | ❌ No |
| Earnings event strategies | Around earnings | ❌ No |
| FOMC / macro event strategies | Around events | ❌ No |
⚠️ Platform Data Boundary: This platform provides T-1 EOD closing data only. This design is intentional: it is the correct data for multi-day-to-multi-month options strategy research and backtesting. It is not for intraday, 0DTE, or earnings-event strategies, which require intraday path data that EOD snapshots cannot provide.
⚠️ Research Use Only: This article is educational. T-1 static closing snapshots cannot capture intraday price gaps, real-time margin requirements, slippage, financing costs, or intraday liquidity gaps, so backtested returns always deviate from real trading outcomes. Nothing here is a buy or sell signal. Use this platform's backtests as historical statistical reference only; past performance does not guarantee future results.