Multi-Line Graph Maker — Multi-Series Time Trend & Cohort Plotter
A multi-line graph plots two or more time-indexed series $Y^{(k)}_t$ on a shared Cartesian coordinate plane to reveal divergence, convergence, crossovers, and relative velocity.
Tip: Paste Excel or Google Sheets rows (Ctrl+V / ⌘V) directly into any cell.
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Series spread at time t: Spread_t = max_k(Y_{t,k}) - min_k(Y_{t,k}). Relative outperformance: Alpha_t = Y_{t,A} - Y_{t,B}.
Chart Design & Use-Case Tips
- 01Series spread at time t: Spread_t = max_k(Y_{t,k}) - min_k(Y_{t,k}). Relative outperformance: Alpha_t = Y_{t,A} - Y_{t,B}.
- 02Limit multi-line charts to 2–3 distinct trajectories to avoid 'spaghetti chart' tangles where overlapping lines obscure trends.
- 03Ensure all series share the same measurement unit (e.g., Dollars, Percentage, or Index = 100 at T0) so vertical separation has a consistent meaning.
- 04Hover over any vertex node to inspect exact series values at that timestamp.
Frequently Asked Questions
How do I compare two series that have very different magnitudes?+
Normalize both series to an index of 100 at the starting period (Value_t / Value_0 * 100) so the multi-line chart directly compares percentage growth since inception.
What do the different vertex shapes or colors indicate?+
Each series is assigned a distinct high-contrast color from your chosen industrial palette and mapped in the top instrument legend.
Can I use Multi-Line Graph Maker for A/B test tracking?+
Yes, enter Variant A in Series A, Variant B in Series B, and Control in Series C, or open the dedicated Multi-Line for A/B Test Metrics template.