JavaScript Dashed Spline Chart

Example showcasing use of DashedLine style in a chart with two time series trends along the same Y axis.

This approach could be used in use cases with 1 "primary" trend, and 1 or more "supplementary" trends, which don't reflect the primary message of the data visualization but rather some "extra" information that may be useful along-side.

In this case, the dashed line style helps convey the message that this trend is not the main point to look at.