SPX Call spread

STO Aug 26 2210/2220 for 2.15.
How high can she go? Anybody’s guess, but I’m thinking we will get some pullback to around the 2120 level of the breakout before then. Not selling puts yet as I like to wait for the pullback. Sure as I sell them now, I’ll be rolling them or taking losses at the pullback. So, trying to be patient.