It is possible to insert a chart from a saved presentation or document. This means, instead of having a regular folder to a chart in Content, a chart can be saved as a presentation or as a document with a template of the specific chart. Thereby, we cannot format the chart, but only create a new one.
For instance, take a look at Bunker Holding. The Waterfall chart, which is a relative new one, is placed in a folder containing the template as an actual presentation in this path:
This structure works in PowerPoint and Word.