Rocket Chat - How to get into Rocket Chat

To start, please go to the main page of the Marketplace service by clicking on the name of service on the top left of the page, next to the Seeking Alpha logo. 

On this page, please click on the launch chat option and then on the following page, please select the "web application". Your chat window will then open and from there, you can directly chat with the author of this page. See GIF below: