I would to know how many queries per minute or day one can
For historical -- all intervals
Total stocks in ticker
Instead of subscribing multiple times can I run multiple instances of ticker each can handle 50 stock ,
You can check out this thread to know API rate limits. Opening a new connection for each instrument is a bad idea. You can open up to 3 connections using one api_key. With one connection you can subscribe for up to 1000 instruments.
Opening a new connection for each instrument is a bad idea. You can open up to 3 connections using one api_key. With one connection you can subscribe for up to 1000 instruments.