This type of statistics is not available for the selected time period.
Try to open the statistics for earlier dates.
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Please note that insufficient number of days have passed to count retention of visitors with selected time interval, therefore no data.
The chart shows average of every column of the chart below.
For 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.