Breaking out of Price Channels
Breaking out of Price Channels, by Gerald Marisch, "Technical Analysis of Stocks & Commodities", January 1998, page 93.

"Here's a technique based upon Tushar Chande's variable-length moving average. The indicator is more responsive to market price movements than a conventional simple or exponential moving average, and can be used for position trading."

The following formula will match the authors slight modification to the variable moving average:

VIDYA 21,5 Indicator 
Length:=Input("Length",1,200,21);
Smooth:=Input("Smoothing",1,200,5);
AbsCMO:=(Abs(CMO(C,Length)))/100;
SC:=2/(Smooth+1);
VIDYA:=If(Cum(1)<=(Length+1),C,(SC*AbsCMO*CLOSE)+(1-(SC*AbsCMO))*PREV);
VIDYA 

The following Expert highlights will show you when the price has undergone trend changes as discussed in the article. Enter each section as a separate highlight in an Expert Advisor. To do this, create a new Expert and select Highlights from the tab dialog. Then select New and name it Bull. Paste the Bull trend formula into the condition box within the editor and set the colour to green. Do this for the Bear and the Pause conditions as well, selecting the matching colours, Attach this Expert to your chart and if the conditions are met, the price bars will be displayed in the proper colours.

Green Bars (Bull trend) 
Length:=21; 
Smooth:=5;
AbsCMO:=(Abs(CMO(C,Length)))/100;
SC:=2/(Smooth+1);
VIDYA:=If(Cum(1)<=(Length+1),C,(SC*AbsCMO*CLOSE)+(1-(SC*AbsCMO))*PREV);
C>(Vidya*1.01)  
  
 
Red Bars (Bear trend) 
Length:=21; 
Smooth:=5;
AbsCMO:=(Abs(CMO(C,Length)))/100;
SC:=2/(Smooth+1);
VIDYA:=If(Cum(1)<=(Length+1),C,(SC*AbsCMO*CLOSE)+(1-(SC*AbsCMO))*PREV);
C<(VIDYA*.99) 
  
 
Yellow Bars (Pause or pending reversal of the trend) 
Length:=21; 
Smooth:=5;
AbsCMO:=(Abs(CMO(C,Length)))/100;
SC:=2/(Smooth+1);
VIDYA:=If(Cum(1)<=(Length+1),C,(SC*AbsCMO*CLOSE)+(1-(SC*AbsCMO))*PREV);
C>(VIDYA*.99) AND C<(VIDYA*1.01)