This interactive network graph visualizes trade relationships between countries, showing nodes sized by country group and colored by category. The visualization uses d3.forceSimulation with link, charge, collision, and center forces to position connected nodes dynamically. Links are displayed with arrowheads and stroke widths proportional to trade weight, while node labels show country names. Users can drag nodes to rearrange the layout, triggering the simulation to recalculate positions. The example loads JSON data containing node attributes and weighted links rendered as SVG lines and circles via D3 v6.