Mine doesnt give me the option, its records from setting off to reaching destination i.e it doesnt stop counting when I stop. I'd prefer it to stop recording when I stop, because its already giving me the distance and total time, I can work out the average myself. A moving average would (to me) be a better indicator of cycling performance, because even on the same route, you will encounter the lights at slightly different times hence having longer stationary points to drag the average down, other time you may catch them all on green. So to me, this is more indicative of how well I timed my commute than how fast I was riding. A moving average will still be effected by traffic, but less so than a continuous average. Downfalls of a cheap computer, but at least I can log my miles!