Trader's Journal - app concept

Final shot of Trader's Journal for now, my latest app concept side project.

I don't have a lot of experience with designing dark UIs, so I would love to hear your thoughts on it. I personally think that the background, with its rather discrete gradient, makes a big difference compared to the solid dark grey I started out with. If you have thoughts or experience with this, I would love to hear about them :)

All the best, Christian