Graphs should not be smoothed
I think it would be better to not enable graph smoothing, but instead show a step graph, like this one:
http://www.geoafrica.co.za/reddog/gsw/grapher/2Dstep.gif
The way graph are smoothed currently is IMHO a failed attempt to show nice graphs, and more importantly convey false informations. A step graph with a step every day/week would be better.
Edited by André Luís