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flow family
waterfall-horizontal
Horizontal waterfall — cumulative bars along a value x-axis.
Same encoding as waterfall-vertical, rotated 90°. Each row is a component; bars start where the previous one ended along the x-axis. Common when categories have long names (like sectors decomposing into employment).
When to use
Cumulative decomposition with long category labels.
When NOT to use
Compact x-axis labels (vertical reads better).
Rhetorical roles
- decompose
Variants & related
Required primitives
- has_data_labels
- has_axis_titles
Optional primitives
- has_source_note
Common anti-patterns
- mistaken-as-bar-horizontal
Disambiguation rules
- Bars are horizontal; each starts at a different x-position depending on running total.
- If all bars start at x=0, it is bar-horizontal, not waterfall-horizontal.