Quote from yip1997:
Are there any free softwares or websites that compute the span margin for you?
Quote from yip1997:
I think so. Brokers like IB charge you the cancellation fee whereas ameritrade doesn't.
Quote from yip1997:
Can you trade credit spreads in an IRA?

Quote from Aardvark:
ANY defined risk trade....Credit spreads, calendars, naked puts...only naked calls are not allowed at TOS which right now is the best broker if you want to trade options in your IRA. You cannot trade ES however anywhere in an IRA some sort of reg rule's...it may change I have no clue why you could not at least buy ES.
Quote from ids:
There are no restrictions on trading any futures and futures options on IRA. These instruments do not involve money borrowing.
AFAIK, there are no free SPAN margin calculators. London SPAN calculator works fine but only for British markets.