Solved: What does this symbol mean in Charge 4? - Fitbit Community
Fitbit Charge 4 (and Charge 3) tips and features: How to use your new tracker
Meaning of symbols on Charge 3 screen - Fitbit Community
How do I navigate my Fitbit device?
Fitbit Support on Twitter: "@funtoretire Was it on the clock face when you saw the 3 dots on the side of the heart rate symbol, or was it on the Today app?