More trending

I mentioned this in passing before, but I now have enough data that I think it's worth a post of its own.

If you see the "???" entry hitting your Dex screen after a trend gets established, and see that there are actually two of them in a row, YOU ARE PROBABLY MOVING TOO FAST FOR THE DEX TO SHOW THE NUMBERS.

Oddly, this is the single most powerful indication it can give you.

At that point, use your meter.

Suggestion to Dexcom folks: have some software indication for this particular point to urge a meter test.