When comparing data e.g. number of visits, entry pages etc with data of day before there is a problem: when checking earlier than 23:59 there is always a difference because the period taken into account is shorter than the complete day before and with this not all "things" of this day has already happened.
An example: Looking at data at 9:00 in the morning: actual data is taken from 0:00 to 9:00 = 9h the data for comparison form 0:00 to 0:00 = 24h
the result looks like this:
=> there are two ways to solve this: - compare data always the last 24h 9:00-9:00 to the 24h before 9:00-9:00 - compare last full day 0:00-0:00 to the last full day before 0:00-0:00
for same reason for graphs I would vote for not connecting the data point of today to the others before the end of day (0:00) This would people trigger to be aware of this problem may look like this:
what do you think of this?
of course this is not only relevant for comparing the actual day with the day before but to all comparisons of data of unfinished periods with complete periods before => made issue's title more global
For your first feedback regarding Insights, please check this issue which discusses it as well: https://github.com/piwik/piwik/issues/6600
For your second suggestion on the graph, it is a nice idea IMHO, do you mind creating a new separate issue just for this?
done, see: make a difference in graphs for data of "unfinished periods" and "complete periods" #10291