Menu with white font is much better. I think we should make it smaller in height to gain some vertical space.
I like the idea of the dialog box but I think black doesn't work. It catches the eye but the eye should focus on the charts instead.
I think if you make it grey and align it left (over the left chart) it will work great. And you can remove "Stock analysis" bar, actually we don't need it. It takes a lot of vertical space.
For the arrows they are better here but they look very thick. I think you can make them more elegant. :)
Please get back to me about the colors of the side charts. They are not always green.