Can anyone be kind enough to explain how this tool is supposed to work? In particular a) What are the deepskyblue and palevioletred marks on the indicator line. When do they register and what do they indicate when they register on the indicator. b) what do the 100 and -100 limit for the red line in the indicator mean? c) In general terms what is the indicator tellings us. Thank you in advance - It is clearly an effective indicator but I need to understand what the indications are to fully appreciate its power.