Parabolic trendlines

I noticed! And frankly, I still cannot get it to work. Well, I can draw the parabola ok - but it never seems to connect the points I want to connect. This is more a mathematical problem that a software one, I think. The points in question simply do not line on a nice clean parabola. It is a curve that rises geometrically, but that does not mean that it is parabolic.

I seem to have read somewhere that Bullcharts can claim to being one of the only programs in the world to be able to draw parabolic trendlines. Is this so?

I ask as my very last trade turned out to be just one of these things - I bought at the very top of the parabola - not knowing what was going on, and only by accident I looked at the larger picture and saw it.

I want to document this failed trade as it is a great learning experience. I tried to draw a parabolic trendline, but could not get it to come even close. Is there some trick to it??  Should I read the help?

BTW - the stock in question is KZL if you are interested in having a look.