At present there is no API which provides the previous minute candle in bulk. As a result the developer/application needs to send requests one by one. So at 9:21 am if we want to get 9:20 OHLCV candle data for 1 minute for 2000 stocks , we need to send 2000 requests , which will take a long time. By this time the market would have made substantial movement and thus this sequential process of data request is not tenable.
We need a functionality, through which in a single request we should get all 2000 stock data for a specific timestamp and period (1 minute) in bulk. There can be segregation based on equity, FNO, Commodity forex etc.
This functionality of fetching 1 minute candle data in a single API call has multiple advantages.
1] Developer / application will send lesser requests to your server for real time data fetching.
2] For historical data fetching also the no requests will be much lesser. For a day , the developer/ application will send 375 requests instead of 2000 requests.
The idea here is looping over timestamps instead of stocks.
You already have the 1 minute candle data for all the stocks. The idea is to combine all this time stamped OHLCV data together.
I hope you understand the importance of this functionality and request you to consider the implementation and release at the earliest.
If you have any questions or want to discuss, please give me a call.