I bought the Apr.9 CAT 202.5 call for 20.20. It is now up about 35% and I want to sell a call to create a debit spread. The stock is currently selling for 229. My question is which strike should I sell? According to the Chuck Hughes option spread calculator if I sell the 227.50 strike call for 8.67 I realize a 116.8% return. If I sell the 212.5 call my return is 432%. The 205 call is at 25.07 which is more than my original investment, so basically the narrower the spread width the greater the return, according to the calculator. Am I understanding this correctly? Is there any downside to selling the call closest to my existing long call?