This site is not being actively developed, but will remain available with the current functionality and stay free!
If there is a feature you would like added please raise an issue or even better submit a pull request on GitHub.
If you are looking for more features such as burndown and cycle time you may be interested in Corrello.
How to use Trello Cumulative Flow?
1. Login with your Trello account

2. Select a board

3. View your Cumulative Flow Diagram

4. Look for bottlenecks
