Hello! I have a question about what margin that actually is required for below VXX position. I calculated it here and got this. I wonder if below is really true? http://www.cboe.com/trading-tools/calculators/margin-calculator Position: Long 1 Mar 17.5 call(s) at $1.74 Short 100 VXX shares at $17.81 Initial Margin Margin requirement for long call(s): $174.00 Margin requirement on short sale of stock: $2,671.50 Proceeds from short sale of stock: $1,781.00 Margin call (SMA debit): $1,064.50 Question 2: When they say margin call (SMA debit): $1,064.50 What does that exactly mean. Does that mean as long as CASH + positions is worth MORE than $1,064.50, I will not have a margin call or do they only mean FREE cash? Thank you