This example shows electronic sales closing rates from 2013 to 2021 using a combined line and area chart. The orange line traces the data points with a smooth curve, while the red area beneath fills the space down to the baseline. The visualization loads CSV stock data and uses d3.csv, d3.scaleTime, d3.scaleLinear, and d3.line with d3.area and curveBasis to render the SVG paths. Axes are generated with d3.axisLeft and d3.axisBottom, with dates parsed via d3.timeParse.