Four metrics can be tracked in this chart area. By default, this is the sixth chart area down your Report page. The four metrics displayed here are:
Engagement Rate: The number of engagements (Retweets, Replies and Likes) divided by the total number of followers on a given day.
Average Retweets: The average number of times users retweeted a tweet from your account.
Average Replies: The average number of times users replied to a tweet from your account.
Average Likes: The average number of times users liked a tweet from your account.