we count them intra day if triggered.  I've commented on this multiple times and I cover in that 26 min video in that section I suggest you watch that.  There's some times in the past that if you wanted until the close you would have been 90 points worse as there were some of those 100 point down days where the DVT triggered early in the morning, by waiting for the close you gave up a lot. But are there some times when the DVT is just barely hit and prices bottom and would have been better to just stay put? Yes of course. 

again it's a guide and I think one who follows them should have a plan and monitor this stuff, and when those DVT's get close or trigger look at some intra day charts see if you want to just exit with the DVT price or hold a bit more giving some extra room if you think it's one of those times where you think price will recover and you avoid the whipsaw by staying put.  And if you stay put still have some sort of exit plan, a price level where you sell if it doesn't do what you think.

That's for you to determine - devise a plan that is commensurate with your risk tolerance and adhere to that plan.  After a parabolic move wise to take some money off the table and tighten trailing stops as we have discussed ad naseum in the days the market was running.   Thus, you should now be in cash - simple as that.  Most important thing to do is to map out a PLAN which many fail to do and thus have no basis upon which to act.