Retention
This type of statistics is not available for the selected time period.
Try to open the statistics for earlier dates.
If you think it is a mistake try to repeat the query later or report it to us using feedback form.
For the statistics with a given step: "day", "7 days", "14 days", "21 days", "30 days" the data is counted from the current day to 1, 7, 14, 21, 30 day respectively.
Rolling Retention is the part of active visitors after a certain time.
Step is the proportion of active visitors after a certain time with a selected step.