Weight / Fat loss

Bothwell, how does that account for days when you are more hydrated? If you drink more water you will be heavier but have consumed no extra calories. I thought that was why it was advised to only weight yourself once a week, so you aren't worrying about fluctuationa from day to day.

It accounts for it through the moving average - extreme peaks and troughs are smoothed out over time as you increase the size of the data set. It's not really that great for people who tend to freak out at daily fluctuations, but if you recognise that those fluctuations are normal and that they happen to everybody (sometimes with no apparent reason) then it becomes a very powerful tool for seeing what happens to the fuel that you put into your body.

But it's no use measuring them for a couple of weeks then pretending that's enough of a data set - you're talking a period of 5-6+ months before you get a genuinely useful average out of the data that accounts for natural peaks / troughs.