This visualization shows Salesforce stock closing rates from July to November 2020, combining a smooth line chart with an area chart beneath it. The SVG renders with D3 v5, using `scaleLinear`, `axisLeft`, `axisBottom`, `line`, `area`, and `curveBasis` to create the curved paths. Data is loaded via `csv` from a GitHub gist, with the x-axis representing months and the y-axis showing closing rates.