If you get the error message "This indicator requires a volume field for calculation" or "Missing source field for indicator VWAP," this indicates that you are making a new chart and adding VWAP to it. Awesome! But not so fast!
Before adding this indicator, you must add the volume indicator to the chart first (the VWAP indicator needs volume as a reference).
This video here shows how to add indicators to your new chart. Choose to add the volume indicator, and then you can add the VWAP indicator.
If you continue to have trouble with this, please email us at firstname.lastname@example.org or open a support ticket here.