An Area Chart fills the region between a data line and the axis, making it easy to compare magnitudes across multiple series over time. When values dip below zero, the filled areas extend downward, clearly highlighting negative trends.
This sample charts company profit trends across four U.S. Census Bureau regions from 1996 to 2015. Overlapping semi-transparent areas, dual axes, a crosshair with byX hover mode, and union tooltips let you compare all regions at any given year -- including the West, which turned negative after 2000.
Follow the step-by-step Area Chart Tutorial to learn how such charts are built. See the Area Chart documentation for all configuration options.