This is an old revision of the document!
As mentioned in the Date Range configuration option, data points used to create a trend chart are averages over intervals (i.e. for a trend chart with the “1 Day” option selected, the data points are averages over five minute intervals) as plotting every data point can cause performance issues.
When this option is checked, raw data will be shown in the trend chart instead of averaged data. Note that because the raw data can be rather large, it may take longer to reload the chart especially in the cases were there are many attributes selected and/or the date range is one week or one month.