Your bar chart shows product revenue, but leadership wants to know which 20% of products drive 80% of sales. The classic approach places a static cumulative line on a combo chart, but the line only rises monotonically if the sort order is controlled at the query level — not just visual formatting. The threshold color coding (primary color below 80%, muted above) requires a DAX pattern that evaluates per item: CALCULATE(FILTER(...)) strips the item context and returns the same color for every bar. Building it correctly with the SQLBI WINDOW + RANK pattern, fixing the sort definition in the visual query JSON, configuring the dual Y-axis, and styling the combo chart requires knowledge of undocumented visual.json properties. This skill generates everything in one command.