Connects data points with horizontal and vertical lines, creating a staircase pattern that shows discrete changes. Unlike smooth lines, step lines accurately represent values that remain constant between changes.
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Best for
- Interest rates and pricing tiers that change at specific points
- Data that stays constant between updates (e.g., inventory levels)
- Showing exact timing of changes without implying gradual transitions
Avoid when
- Data transitions are genuinely smooth or continuous
- You have many frequent small changes — a regular line chart looks cleaner
- Aesthetic smoothness is more important than accuracy
Alternatives: Line Chart