I thought I might revive this thread . Why you might ask ?
Well in my trading journey this is the one indicator which I find being used above all others by the Traders that I respect and know to be profitable.
I guess it doesn't rate too much of a mention here as it is easier to criticize indicators generally .
I acknowledge the following... Indicators are over used
Indicators more often than not are used incorrectly
Most indicators are processing the same information
only slightly differently..
However that doesn't mean that indicators are not useful and cannot be used successfully with certain trading perspectives IMO.