Which function would you use to graph historical price spread and ratio?

The function used to graph historical price spreads and ratios is HS. This function allows users to analyze the spread between two financial instruments over a specified time period by visually representing the historical data. By utilizing HS, users can identify trends, calculate averages, and gauge the performance of different assets relative to one another through their price spreads and ratios.

This tool is particularly useful for traders and analysts who are interested in understanding the relationships between different market securities and executing strategies based on that analysis. The ability to visualize historical data helps in making informed decisions based on the historical performance of the spread, thereby enhancing analytical capabilities.