A quote

From stocktiming today:

“Do we close our position, or add to our short position with the building divergence on the VIX?
There is no perfect answer here.  If they run it up further tomorrow, you won't be happy.  If the broadening VIX divergence kicks in and the SPY goes down, you will wish you had added to the short. 
My life rule is, "don't challenge a guy who has a gun ... it might just go off".  So, don't challenge Mr. Wall Street by adding to the short.    Okay next, invoke the sleep rule ... if you might lose sleep at night due to a position you are holding, close it because you are out of your comfort zone. ”