I have a follow up question. For option with two legs (strangle/straddle etc), does the order gets executed in one trade or does each leg is executed separately (when I submit the spread or straddle or strangle as a single order).
The only strategy where you can ensure both get executed at same time is the calendar spreads.. http://www.zerodha.com/z-connect/blog/view/zt-spread-orders check this out..