Hi,
While automating, I have a lot of metadata in an order which I store locally in my machine. Due to multiple sources of order data, results in bugs in automation code. I would like to pass and retrieve the metadata against each and every order that I place, thereby eliminating the need for me to maintain an order table.

I wish to get candle data (OHLC) aggregated over a 15 minute time interval (instant, not historical) for BANKNIFTY, without sampling and aggregating at my side. The historical API provides exactly what I need, but I need it for BANKNIFTY and it doesn't return anything even if I try. The documentation states that I can only get historical data for futures and not indexes. How do I get this?