This example shows a financial time series chart of Yahoo stock prices, plotting open values as both a filled area and an overlaid line against timestamps. The chart uses horizontal gridlines for scale reference, with five y-axis ticks and a cleaned domain for readability. Built with D3 and the d3fc library, the code constructs a `linearTimeSeries` chart, composes area, line, and gridline series via `fc.series.multi`, and renders the result as an SVG. Data is loaded from a CSV file.