Hummingbird Hover-Graph is a free Chrome extension developed by tacticalarbitrage. As an add-on in the Browsers category, it provides a convenient way to check the price and sales rank history of any product on Amazon. With just a click on the extension icon, users can access a wealth of data to aid in analyzing and making informed sourcing decisions.

Using Hummingbird Hover-Graph is incredibly simple. When on an Amazon product page, users can click on the extension icon and a user-friendly interactive graph will appear. This graph allows users to hover over different data points to gather key information about the product. Whether it's price fluctuations or sales rank trends, this extension provides the necessary insights to make well-informed decisions.

With its easy-to-use interface and comprehensive data display, Hummingbird Hover-Graph is a valuable tool for anyone looking to analyze Amazon product price and sales rank history. It is a must-have for individuals involved in e-commerce or product research.