When I log into my piwik installation, I see the visits during the current month. This means that on the 1st of each month I will see 0 visits, and they will increase each day, until the next month.
I don’t like this, and I would really prefer google analytics style, which always displays the last 30 days. This way you get consistent results every day, and the trends are much easier to spot. Is this possible in piwik?