For those of you defending NT on the release of v 8.1.6.1, I suggest you poke around in this discourse community… there are multiple problems and NT is admitting it to users who have emailed them about it. I have used Ninjatrader for years and it seems to me that the 8.1.6.x releases are the worse Ive seen in a while. You cant download 8.1.6.0 now in Prior Releases.. you have to go back to 8.1.5.2.
Here is a thread on problems with Volume Profile… it happens often even with a clean install… the more data you load on your chart the worse the problem gets. Ive seen this happen to a number of traders I know, its not a fluke and its not user error.