When there are multiple charts on a single page or panel of a dashboard, it is often benefitial to use the same scaling of the value axes. This may be required not just for the same metric but also across metrics (for instance, to represent income and expense)
You can easily achieve this via the properties editor. In the IBCS section of the properties editor, you will see a drop down selector for the scaling group.
Choose a scaling group and then repeat this step for all the charts on the same page that need to part of the same group. You can also set some of the charts into one group and another set (on the same page) into another group.
Here’s an example of a page where there are multiple charts with different metrics that are all scaled by placing all charts in scaling group ‘Group 1’.