A Dotcom-Monitor Waterfall Chart is a bar-chart type data visualization that sequentially displays both the individual performance and cumulative effect of individual webpage elements loading in a browser.
Waterfall Charts are generated as part of a performance report, and are accessible from Online Report > the Log tab by clicking on the chart icon in the corresponding line.
The load-time for the individual aspects of each webpage element is displayed within the waterfall chart, including Domain Name Server (DNS) resolution time, Connection, SSL, Request, First packet, Download, Start Time, End Time, and Speed (in bytes per second (bps), and kilobytes per second (kbps)).
A Waterfall Chart data are updated automatically after each playback of a web application monitoring or load testing script in the EveryStep Scripting Tool.
Find more details in the video walkthrough of the Waterfall Chart.