This diverging bar chart compares monthly crude oil and natural gas prices over time, with blue bars extending to the right for natural gas and red bars to the left for crude oil. It uses a shared baseline at the center of the chart to emphasize the relative magnitude and divergence between the two commodities across dates. The visualization is built with D3.js v7, employing linear scales for both axes, a band scale for the categorical date axis, and SVG rectangles for rendering. Data is loaded as CSV from a remote GitHub gist.