I pretty much weigh and measure every single day so no real rolling average. I only put it in my chart when I remember the numbers.

That said, I think in terms of rolling average which prevents me from freaking out if there is a weight flux for some reason
You can see by my chart that the Ormon is pretty consistent. It may be off a bit but I tend to believe it is close to right for this sort of application. I stay hydrated equally and I measure at thes same time every morning when I wake up.