Comparing Four Data Providers for Six Tickers Over Five Years When evaluating alternative security trading strategies , you need valid and consistent stock price data . To help you evaluate trading strategies of your own, this post examines four data providers for six tickers (AVGO, GOOG, PLTR, GE, ORCL, and SPY) over a five-year time span starting on October 7, 2020 and running through October 6, 2025. The four data sources compared in this post are Yahoo Finance GOOGLEFINANCE in Google Sheets Finviz.com Tiingo.com The post’s first substantive section highlights key findings about the differences in results by ticker across providers. Data providers that return results that match other vendors are good candidates for using in your analyses in the same way that data providers returning results that do not match other providers are poor candidates for using in your analyses. Another criterion for selecting a data vendor is whether the vendor...