A Multi-Decade Framework for Comparing Ticker Prices from Two Spreadsheet Data Providers This post presents a framework for collecting daily historical ticker prices from two spreadsheet-based data providers over multiple decades for six tickers. The providers are the GOOGLEFINANCE function in Google Sheets and the STOCKHISTORY function in Microsoft Excel. Subsequent posts will track and analyze price trends for the six tickers as well as illustrate how to use multi-decade historical prices for evaluating a collection of buy/sell models, such as the Proper Order and Gain Lock-In (POGL) model for programmatically specifying trade entry and exit dates for tickers. See two appendixes to this post for titles and links to prior posts covering both data providers and the POGL model. Tickers and Spreadsheet Expressions Tracked in This Post The following table includes tickers with matching security names whose historical prices are downloaded in this post. All the trading ins...