Theory :
The idea for this indicator is as simple as it gets : a lot of times we are using some indicator levels as a signal that some desired level is reached and that the price change is to be used as an entry or exit price for our orders / positions. That is all OK but many times we simply are comparing the prices only visually. This indicator is a sort of a "helper" for that. What it does :
Th indicator, as it is, is mainly meant to be used in manual trading.
Usage :
The same as any CCI.

PS:
The "big picture" example that shows in a more clear way how the indicator works and what is it showing us on chart
Corrected double smoothed Wilder's EMA (extended version)
Corrected double smoothed Wilder's EMA (extended version)
Corrected double smoothed Wilder's EMA
Corrected double smoothed Wilder's EMA
RSI with on chart SR levels
RSI with on chart SR levels
Stochastic with support / resistance levels
Stochastic with support / resistance levels