I have $4015 in my Thinkorswim account with $265 of those in cash and the rest in a stock. Never traded options before, but I want to short a XOM put (naked). Is it possible for me to sell one Nov 06 $62.50 Put? Will Thinkorswim let me do it? Do I have the margin required? What about the same strike Oct 06 put? Appreciate the help.