Hi Bob, I put a trade on IB for a stock at 38 (atm roughly) a reverse Calendar spread and it seems to be using up abou $2000 of margin to my shock as maybe $70 max risk. I went into Etrade margin calculator and
Open Calls
Fed Call 0.00 -777.78 -777.78
House Call 0.00 -194.00 -194.00...