CryptoTicker by Coinigy is a free Chrome extension that provides live Bitcoin and Altcoin market data directly in your browser. With support for over 25 exchanges and more than 800 live cryptocurrency markets, this extension is a valuable tool for cryptocurrency traders and enthusiasts.

The extension displays real-time ticker updates and mini charts for your chosen favorite markets on Coinigy. It allows you to stay up-to-date with the latest price movements and market trends without having to leave your browser.

Please note that in order to activate the extension, you must have a Coinigy Account and add your API keys to CryptoTicker. You can register for a free 30-day trial of Coinigy at their website. A step-by-step guide on how to add your API keys can be found in the Coinigy support documentation.

CryptoTicker by Coinigy is an open-source project, available on GitHub. This means that developers can contribute to its improvement and customization. If you're interested in exploring the code or contributing to the project, you can find the source code and Coinigy API documentation on their GitHub page.

Overall, CryptoTicker by Coinigy is a useful Chrome extension for those who want to stay updated on the latest Bitcoin and Altcoin market data while browsing the web.