Historical Price Use Cases for the GoogleFinance Function in Google Sheets In the quest to develop smarter, more reliable trading strategies tailored to individual preferences, historical price data plays a vital role. It helps analysts, developers, and self-directed traders fine-tune algorithms, validate models, and uncover patterns that might otherwise go unnoticed. But despite its significant benefits, acquiring and processing high-quality historical data often requires substantial investments in time, money, or both. As a security price data analyst and quantitative analysis trainer, I gravitate toward rich historical data sources that are both free and easy to use. This is because I want readers like you to be able to try out the analyses and models discussed in my articles. For years — including the early days of this blog — I relied heavily on free historical data from Yahoo Finance. That changed abruptly when Yahoo Finance discontinued free access to its data . In ...