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Towards Data Science

Demonstrates how to add a starting value to waterfall charts in Power BI by expanding the data model with a second date table. The solution involves creating custom DAX measures that calculate year-end values from the previous period and display them as the initial point in the waterfall visualization, overcoming Power BI's native limitation of not supporting start totals in waterfall charts.

On Adding a Start Value to a Waterfall Chart in Power BI