Range Spline Area Chart looks very similar to the Area Chart type of data visualization. The core difference between them is that the latter graph is based on plotting Y-axis values one by one, whereas the former, the Range Spline Area Chart type, draws two Y-axis values at a time – Low and High.
Also, the area between the lowest and highest values in Range Spline Area Charts is filled with color, not the area between the X-axis and the series like in Area Charts. Another difference is that data points in such a diagram are connected with smooth curves instead of straight lines.
A Range Spline Area Chart is typically used to display the difference between the minimum and maximum values over a certain time period, including visualization of data sets for prices, temperatures, and so on.