Up Trend
Trend = High+ ATR * Multiplier;
Down Trend
Trend = Low - ATR * Multiplier;
CCI Zero Line CossOver - UpTrend
CCI Zero Line CossUnder - Down Trend
The original implementation do not use ATR Multiplier
My version gives you a choice.
You can set ATR Multiplier parameter to zero.
In my opinion this is better.
The indicator was revised and updated