fresh block
The visualization shows a time-series area chart of stock prices, with the area colored red for values above 150 and blue for values below 150, highlighting threshold crossings. It uses D3.js (v3) with `d3.svg.area()`, `d3.time.scale()`, and `d3.svg.axis()` to render the SVG. Data is loaded from an external TSV file and parsed with `d3.time.format`. The code splits the dataset into contiguous segments based on the price threshold, then draws each segment as a separate colored area path. Axes are added for time and price, with the y-axis labeled “Price ($)”.