This example uses a linked dataset of company descriptions and relative scores to create a 20-step heatmap grid. Rendering as a flexible HTML/CSS grid, each of the 20 cells is colored by a three-color gradient from light gray to dark teal, based on the company's relative score rounded to the nearest half. The visualization includes interactive tooltips, a mouse-following indicator, and a details panel that appears on click, showing company information like industry and a link to its Nasdaq page. The chart uses D3's `scaleLinear` for color mapping and `json()` for data loading.