My Query: 1. When I request data for each CE/PE is that considered one request call from the server end and hence will be throttled to 10 requests per second? 2. I understand I can get live/current data by above method, and keep saving them in table according to time etc. however if I want to get historical data, lets says morning data or yesterdays data for Options prices/OI etc, do I need to subscribe for historical data subscription as well?