The response from [FourXXXX] was as follows:
Small Dot is the current time frame high or low based on EMA's, the more rings the higher the time frame. Change time frames on a chart and see how the Semafors change increase time frame and when the Semafor becomes a single dot that is the time frame it is from.
PD: If someone else from the forum has an additional contribution, welcome it
Thanks to xard, and thanks FourXXXX and thanks all.