We’re offering a December 90 call short for 1.80 against a January 90 call acquired earlier for 2.34. My goal for the position is to double our money at least, and that implies we can use a stop-loss as wide as 78 cents (since risk:reward should ideally be held in a 1:3 ratio throughout a trade). Accordingly, I’ll suggest stopping yourself out of the position if the January 90 call trades below 2.00 (We’re being very conservative on this one.)