Hello, I'm trying to figure it out how people calculates intraday data without actually having the past data. There is no problem if you want to calculate for Daily/Weekly/Monthly data because even Yahoo gives all the data since stocks IPO and you can get it free. But when it comes to intraday data even if you want to pay, there is no data more than 2 years. My questions is how companies calculate indicators like EMA, RSI, ADX etc. (which needs previous value of itself) Best.