[amibroker] Trying to code the CCI(20)

["Gerard Carey" <gcfinance@xxxxxxxxxxx>]

I'd appreciate some help in coding the CCI(20) as I wish to customise
the indicator.
I'm using the following description from Incredible Charts but my
efforts are to no avail.

// Calculate Typical Price ("TP") ie. (High + Low + Close) / 3
//Calculate TPMA: a 20-Day simple MA of TP.
// Subtract TPMA from TP

//Divide the result by the following: 

//Subtract today's TPMA from TP for each of the last 20 days. 
//Sum the absolute values AND divide by 20. 
//Multiply the result by 0.015.

// HERE IS MY ATTEMPT
TP=(H+L+C)/3 ;  // Calculate Typical Price
TPMA=MA(TP,20) ; // Calculate TPMA: a 20-Day simple MA of TP.
ConditionA=TP-TPMA ; // Subtract TPMA from TP

//Divide the result by the following: 

// Subtract TODAY'S TPMA from TP for each of the last 20 days, sum the
absolute values AND divide by 20. 
ConditionB=( TP-TPMA + Ref(TP,-1)-TPMA + Ref(TP,-2)-TPMA +
Ref(TP,-3)-TPMA + Ref(TP,-4)-TPMA 
+ Ref(TP,-5)-TPMA + Ref(TP,-6)-TPMA + Ref(TP,-7)-TPMA + Ref(TP,-8)-TPMA
+ Ref(TP,-9)-TPMA 
+ Ref(TP,-10)-TPMA + Ref(TP,-11)-TPMA + Ref(TP,-12)-TPMA +
Ref(TP,-13)-TPMA + Ref(TP,-14)-TPMA 
+ Ref(TP,-15)-TPMA + Ref(TP,-16)-TPMA + Ref(TP,-17)-TPMA +
Ref(TP,-18)-TPMA + Ref(TP,-19)-TPMA )/20 ; 

ConditionC=ConditionB*0.015; //Multiply the result by 0.015

Plot(ConditionA/ConditionC,"",4); // The Division and Plot

TIA
Gerard

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