To improve usability, have chart types and Timeframes as buttons instead of drop down. At moment, there is no action where it can automatically change the chart to bar chart and then candlestick chart via a shortcut or an action. This is possible with timeframes (adding an action and shortcut) and having ability to add action that changes the current chart type is useful.
Now with a big screen, yes you can have a chart against a chart but I like (like others) to bring laptop or work on laptop and having them aside makes it too small. It makes it more usable.