Updated graph details!Old:It used to be like this:
Each column width is 5 days (10 pixels). "Days" start the second the first Merit was transfered, and count exactly 5*3600*24 seconds after that. It has nothing to do with calendar days in any time zone.
The maximum is 100 Merit per column (2 pixels per Merit). If more than 100 Merit was transfered in a 5 day period, the top of the column gets darker.
But the graphs got too big.
New:In the new graph, each column is 10 days (8 pixels) wide. The maximum is 150 Merit per column height, at 1 pixel per Merit. If more than 150 Merit was transfered in a 10 day period, the top of the column gets darker.