This area chart visualizes the daily highest and lowest stock prices for RIG, sourced from Yahoo Finance, with time on the x-axis and price on the y-axis. Using D3 v5, the code loads CSV data and employs `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.area` with a basis curve to render the filled region between the price extremes as an SVG path. Gridlines and axis labels complement the chart, which is styled via external CSS.