Hi. Is there options graphing software that works realtime and that can plot double diagonals and other complex strategies. I'm interested in the long the wings or a far month and short the guts of a nearer month. Free software if possible, as I'm a student and do not have a solid strategy or abundant capital yet. If not realtime, then can anyone just direct me to a site that would have these plots and how they evolve over time?. My search for info in the internet for diagonals and double diagonals has been less than dissapointing.