Dashboards: How to overlay 2 charts

I have two charts:

  1. x - date, y - quantity of completed tasks
    2)x - date, y - quantity of created tasks

I need these two lines to be on the same chart (to compare these values). It seems there are no such functionality in Dashboards - to add one more value for y.

2 posts were merged into an existing topic: Chart Creation: Multiple Values on X Axis