WebWith a brokerage account, you can pull realtime data on options with very reasonable rate limits. On top of that, if you want, when you're ready to go live you can trade as many option contracts you want for a flat $10/mo (plus ~$0.12 in SEC, FINRA, OCC fees that you pay everywhere but Robinhood). For historical data, Tradier is a little spotty. WebFree stock data APIs. Real time and historical data, unlimited usage, tick level and aggregate granularity, in standardized JSON and CSV formats. Plus currencies data, including forex, crypto, and more.
ORATS Data API
WebOur historical data and options analytics, including implied volatility (IV), Greeks, risk metrics, and volatility surfaces, are derived from the live data that powers the SpiderRock trading systems, helping to ensure its accuracy and consistency. ... The API makes accessing the data faster for users and allows analysis and customizing specific ... WebHistorical volatility time periods are at 10, 20, 30, 60, 90, 120, 150, and 180 calendar days. The data also includes at-the-money option-implied volatilities for calls, puts, and means, as well as skew steepness indicators. The volatilities are provided for constant future time periods at 10, 20, 30, 60, 90, 120, 150, 180, 270, 360, 720, and ... raw st thomas
Bill Brunner - Senior Software Engineering …
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