This area chart displays the daily trading volume of APU stock from January to September 2020, with filled maroon area under the curve to emphasize volume fluctuations. The y-axis uses abbreviated tick labels (e.g., "100k") via D3’s `format` function, while the x-axis shows months using `timeFormat`. The visualization is rendered as SVG using D3 v5 APIs including `scaleTime`, `scaleLinear`, `area`, `curveBasis`, and `axisBottom`/`axisLeft`. Data comes from the `apu.csv` file, which provides date, value, and volume columns.