Chart Type for Compare Categories. Keywords: compare, categories, bar, comparison, ranking. Best Chart: Bar Chart (Horizontal or Vertical). Secondary Options: Column Chart, Grouped Bar. When to Use: Comparing discrete categories by magnitude; ranking or ordering is the core insight; categories ≤ 15. When NOT to Use: Categories > 15 (use table or search); data has time dimension (use line); showing proportions (use waffle/stacked). Data Volume Threshold: <20 categories: vertical bar; 20–50: horizontal bar; >50: paginated table. Color Guidance: Each bar: distinct color. Grouped: same hue family. Always sort descending by value. Accessibility: AAA — Value labels on each bar by default. Sort control for user reordering.. A11y Fallback: Value labels always visible; provide CSV export. Library: Chart.js, Recharts, D3.js. Interactive Level: Hover + Sort.