Hi, I am currently holding AAPL 08Jan. 180 call with a price of 10.78. I am going to sell its 08Apr. 200 call priced at 12.85 to hedge my holing. Thus, I believe I construct a diagonal spread. My question, will InteractiveBrokers charge me extra margin in addition to the 10.78 I already paid? How do you think about this diagonal? Will it be a good hedge? Thanks.