Your app looks very nice.
But, it seems like you’ve almost completely consumed your own API. In other words, it seems as if you’ve basically made an app that could’ve been completely done without any backend work. I say ‘seems’ because I see that you do have an open API when, for example, I paste /api/stock-prices?stock=goog onto the end of your project page URL to get a json response, as was required in one of the user stories.
Basically, without any documentation, it’s not easy to tell on the surface what you’ve done for this project.
Have a look at a post I made regarding the fCC backend projects and see if you can get a better idea of what these projects are for.