Now that version 1.3.0 of the Exchange extension is out, and the chart is implemented using your suggestion, the TradingView lightweight-charts library, the chart is now responsive if you do not specify width/height. When the window resizes, the charts are redrawn to the new available container size.
I reply to all queries on the forums and via email, once per day, Monday to Friday (not weekends).
If you are new here, please see some information on how to ask for support. Thank you!