Waterfall Chart Trend Line Infographic for geographic heat map excel

Data visualization infographic titled "Waterfall Chart" using a TREND LINE (over time) as the dominant visual element. Show a clean time series across 12 monthly periods from "Jan" to "Dec" on the x-axis and values from "0" to "120" on the y-axis, with sharp axis labels, visible tick marks, and no misleading axis truncation or scale manipulation. The storytelling angle is a surprise outlier: a mostly steady trend line around 42, 45, 47, 46, 49, 51, 50, then a sudden spike at 98 in "Sep", followed by a return to 54, 56, 58. Label the line series "Illustrative value" and clearly mark the outlier point with a contrasting highlight ring and annotation. Add subtle secondary mini-markers or faint step references inspired by waterfall-chart logic, but keep the main chart a line chart as requested.

Include 4 key insight callouts placed around the chart, each with a small icon, a headline number, and a short interpretation in English: 1) "98" — "Unexpected peak in Sep" with a warning/star icon; 2) "+48" — "Jump versus Aug suggests a one-off shock" with an upward arrow icon; 3) "-44" — "Oct reversion indicates the spike was temporary" with a return/down arrow icon; 4) "50" — "Typical baseline before the outlier" with a calm baseline/slider icon. Keep all figures explicitly framed as illustrative.

Add a compact source strip at the bottom reading exactly: "Source / Data note: Illustrative example only. Figures are not sourced and are shown for layout demonstration." Include a small legend in English with exact labels: "Illustrative value", "Outlier", and "Typical range". Use minimal flat design, rainbow categorical palette applied to monthly markers or supporting accents, restrained white or very light background, crisp gridlines, generous whitespace, and a calm analytical mood. Ensure the chart remains editorial, readable, and data-first rather than decorative. editorial data journalism illustration, FT / Bloomberg-grade chart aesthetics, vector-clean infographic layout. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no fake authoritative sources cited, no watermarks Numbers labeled "illustrative" unless the user supplied specific sourced data. No fake authoritative sources cited (do not invent "Source: Reuters 2025" — use "Illustrative example" instead). No misleading axis truncation or scale manipulation.