At present given requirement is little ambiguous to me. Could you please share further details about the same?
- Is both the charts have any relation/linkage between them?
- What is the expected chart type?
BTW, as a work around you can add expression from chart 2 to chart 1. If this won't fulfill your requirement then please share application with sample data. This will help us to provide you desired response.
As per my primary analysis, you can achieve your requirement partially with the help of combo chart. You can view multiple measures using Combo Chart. However, there is restriction that you have use only one dimension.