Thanks all, this is an interesting development
Personally I have a similar problem with averages but I'm interested in beeminding troughs more than peaks. For example, I have goals to do the following every day: a certain number of press-ups, a certain number of minutes reviewing my TODO list, and a certain number of minutes of music practice. Of course the weekly averages matter, but I also want to make sure I don't skip a day and then get away with it by doing more the next day.
In other words, I want to beemind my consistency. Can this be done?