ComparativeLineChart

Comparative Line Chart turns two measures into a dual cumulative-line comparison across any ordered axis (dates, months, years, weeks, periods). Drag the two handles on the chart to isolate any sub-period — a fully customisable side panel recomputes the cumulative total of each series and the delta (absolute and %). KEY FEATURES • Auto-cumulated series — drop any two numeric measures; the visual sums them per period so you don't need DAX cumulative measures. • Interactive comparison range — drag handles + pill toggle; state persists across report reloads. • Rich per-series data labels — independent colour, font, position preset and manual X/Y offset with automatic collision avoidance and optional leader lines. • Smart Y axis — tick density adapts to the viewport, top grid line always lands on a graduation, thousand separator inherited from the measure's format string (locale-aware). • Auto-grow left padding so Y-axis labels never clip. • 13 formatting cards — panel colours, typography, animations (6 easing curves, optional shimmer sweep), period-selector styling. • Welcome landing page with field-well guidance. • EN + FR localisation (178 strings). TECH • Power BI Visuals API 5.11.0 • Supports: highlight, multi-visual selection, landing page, keyboard focus, context menu. • No external network calls. FIELD WELLS • Period — a date, a month or any ordered axis. • Series A — first measure (auto-cumulated per period). • Series B — second measure (auto-cumulated per period).