Your bar chart shows every product, country, or customer — but you only care about the top performers. Power BI's built-in Top N filter breaks with external slicers and doesn't update dynamically. The correct approach uses a ranking measure with the right filter scope to respect all slicer context, but implementing it requires a disconnected table, a rank-based filter measure, a visual-level filter, a dynamic title measure, a numeric slicer, and interaction restrictions so the slicer only affects the target chart. This skill builds all of it in one command — run it with /top-n-rank.