### Comment:
TD Ameritrade and $16,000+  
  
 But I only use $2000 or less when selling spreads expiring every Friday

### REPLY:
So I guess my question is when playing spreads do you profit from credit or collateral? I am assuming credit, right? Do to make more profit I'd have to have higher credit and collateral? How do I calculate how much profit I can make from this play: 
 [https://i.imgur.com/iChUONp.jpg](https://i.imgur.com/iChUONp.jpg)

### END.