We have much better charting coming soon. You'll be able to compare different securities, log scale, bar charts. URL params for things like the range are a good idea.
(And sorry, what do you mean by leave the app? Clicking on a company somewhere should take you to bravos.co/AAPL, no?
When I click between "Watchlists" and "Market News" on the left sidebar, the sidebar stays in place as I would expect from a single page app experience. However, when I click on a stock, it appears that the page reloads, as the left sidebar flickers a little bit.
It's still a fast experience switching between stocks, but I'm guessing it could be even faster if local state is updated with a new selected stock's information with the app shell already in place. Maybe that's exactly what's happening, but the left sidebar flickering just a little bit makes it "feel" like the site is refreshing.