VXX Call Rollup

The only short VXX call position I was actually concerned about:
Bought to close VXX Aug 20 2021 28.5 Calls at $0.16. Sold on Monday and Tuesday at $0.53 and $0.65.

Replaced it with VXX Aug 27 2021 31.0 Calls at $0.48.
As 31.14 was the high for VXX this week, this seems like the correct strike.

My expiring 29, 29.5, 30, 30.5 and 31 short calls look safe now