Zerodha provide 2 year historical data for 1minute candle. But actually a strategist require atleast 5 year of data to backtest. In this bull market, 2 year data is not a correct representative. Can Zerodha provide 5 year historical data for 1minute candle ?
We started collecting intraday data from the last two years, that's all we have. You can maybe approach one of the data vendors for this - truedata/Global data feeds. They give special deal to Zerodha clients.
We don't have Open interest in historical data API.
We only have day's data for expired futures instruments.