Yes.
In the template, add an internal custom property of type Dataset, and populate it with the typical content for an EasyChart's tagPens property. Then use cell bindings in that template to inject the dynamic tag paths into that dataset.
On your click or other event that opens the popup, pass that entire dataset as a window parameter into the popup. In the popup, use a property binding on the EasyChart to pull the root container named parameter into the tagPens property.