The Failed Transactions chart reports the sum of failed payments over time.
Resources and further reading:
How is it calculated?
All unsuccessful payments contribute to this metric, including multiple failed payments by the same subscriber.
In June, 10 subscribers failed to pay once, and one subscriber failed to pay 10 times. Your total number of failed transactions in June would be 20.
What analysis can be gained?
The Failed Transactions chart helps you to reduce and recoup revenue lost to failed payments, and prevent passive churn. A spike in failed transactions might indicate that a large customer's billing has failed and that they may churn 'passively' (churn due to payment failures). You can view failed transactions by specific groups with segmentation.
You can drill down into the data table to see the individual list of failed transaction activities of a specific month by clicking on the particular cell.