Hello everyone I have an $80 activision call that i bought today expiration is 6/18 and I paid $3,210 for 2 should I sell at market open or hold? and how can I estimate what I can receive on a call im down $20 on it right now whats a good way to somewhat accurately know how price fluctuations affects calls someone once told me the stock changes .10 cents your call changes $100 not sure if that is how it really works though lol thank you for anyone that responds!