I don’t know if its sacrilege to mention competitors but…
The graphs on Trading212 mobile app look pretty cool. I don’t have a 212 account but have seen the screenshots a couple of times.
It looks as if the chart line is grey and then highlights for the section of time that you open a trade if that makes sense? (see picture). I imagine you could make it so that as long as you have at least a fraction of a share it is highlighted and stops when you sell your last share.
Also, I think it would be cool if you could add a little dot/icon on the full charts to show the point at which you bought/sold any shares.
Also, also, would it be possible to add small graphs (spark lines?) to the portfolio page for each stock just so you can get a quick glance of the chart without clicking on it, similar to apple stock app.