The Hierarchy:
Supply/Demand
Price/Action
Time/Sales
Volume
Technical Indicators
Supply and Demand is something that we all wish we knew ahead of time...but will never know...Price/ Action is a result of the Supply and Demand...and is the closest thing to an immediate indicator...Time and Sales is a result of Price/Action...and is the next closest thing to an immediate indicator...Volume is a result of all the above...and is the last closest thing to an immediate indicator....Finally, Technical indicators...Bollinger Bands, MAs, STAOs etc. are all mathematical averages of one kind or another...they serve to smooth out all the above and give a visual reference...because of this they are not an immediate indicator.
Many traders get burnt because they do not pay attention to the immediate indicators...although Technical indicators can give a trader the flow and general direction as to where things are heading...they do not give the trader ample time to react when things change suddenly.
The trader who uses no technical indicators, has the ability to paint the picture in his head...the only problem he has is not to be distracted to the point of losing his focus.
The trader who uses Technical Indicators has a visual reference that he can view at any time...the only problem is that he may not have immediate notification of a change which could hurt him.
A blend of both immediate and averaging indicators is best, provided that the Trader has a good understanding of how each one works..... and more importantly...how they can support and and compliment one another...the blend is up to you.