I am very new to coding and Zerodha API, I subscribed to it in the evening. First of all, Iearnt from the internet that I could fetch the historical data for as long as I wanted, but when I tried to fetch 2yr long data for 15 minute candle. My IDE showed an error that it can't exceed 200 days.
Second, I don't know why how much I am changing my code, the symbol, the dates or the interval. My code is returning everytime an empty dataset. Following is a slice of my coding logic and the output. Please explain.