In the Calm app, this occurs when none of the sensors are touching the forehead. When there are solid dots for each of the sensors, the headband is adjusted properly. If this graphic has the same purpose in the MuseLab, why is it always blank? I have adjusted the headband so that it is flush against my forehead. I can also see a feed coming over the scrolling line graph. When I blink or clench my jaw, I see a reaction. I don’t think that all of the sensors are not connected.