Q1: Correct me if I am wrong, buyQty represents the quantity of Bid contracts executed and sellQty represent the number of Ask contracts executed while the Volume represents the total quantity traded. If you look into Ticker1 and 2, you will find that the volume executed within that interval is 75 but if you see the BuyQty and sellQty, it is 75 and 2625 respectively. Can you please explain me the correlation between these 2 attributes? This inconsistency is throughout the ticker data received.
Q2: How can I get the openInterest value in an option?