The waterfall chart compares two run configurations, it is parametered and launched through the [Project Setup](article:13) interface.

![Waterfall.png](wWnlFcXaictn)

The start configuration is displayed on the left while the closing configuration is on the right. The two configurations must define a portfolio date, a model and a scenario. Hence the waterfall chart will compare the two final ECL values through these three potential variations: portfolio, model and scenario. The bottom table only displays the data that was used to build the chart.