This area chart visualizes the opening bid price of EURUSD across 2021, using a smooth curve and semitransparent fill to show price trends over time. The x-axis maps months via `scaleTime` and `timeFormat`, while the y-axis uses `scaleLinear` with formatted tick labels. The chart is rendered as an SVG using D3 v5, with `line` and `area` generators applying `curveBasis` for smoothed paths. Data is loaded from a CSV URL and styled with custom CSS for axis colors and the aqua area fill.