The BugID TD29016645 is still (TeeChartNET2017_4.1.2017.03140) not fixed (see http://teechart.net/support/viewtopic.php?f=4&t=14198). It's a shame! You propagate to use Direct2D instead of GDI rendering in cases when performance is mandatory but you are not able to fix a four year old bug which lead...