Hi Guys,
I have added Team Velocity - Gadget in my JIRA dashboard. I have setup it to display the average velocity of team using last 3 sprints, calculated by story points.
We are currently in 20th Sprint, and definitely completed stories in previous sprints.
However for some reason (that I don't know), this gadget is showing current average velocity as "0".
Please see below screen shot.

I will appreciate any input and feedback to fix this.