//+------------------------------------------------------------------+
//|                                                          CCI.mq4 |
//|                      Copyright © 2004, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"
//----
#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 LightSeaGreen
//---- input parameters
//---- indicator parameters
extern string  m = "--Moving Average Types--";
extern string  m0 = " 0 = SMA";
extern string  m1 = " 1 = EMA";
extern string  m2 = " 2 = SMMA";
extern string  m3 = " 3 = LWMA";
extern string  m4 = " 4 = LSMA";
extern int     MA_Type=0;
extern string  p = "--Applied Price Types--";
extern string  p0 = " 0 = close";
extern string  p1 = " 1 = open";
extern string  p2 = " 2 = high";
extern string  p3 = " 3 = low";
extern string  p4 = " 4 = median(high+low)/2";
extern string  p5 = " 5 = typical(high+low+close)/3";
extern string  p6 = " 6 = weighted(high+low+close+close)/4";
extern int     MA_AppliedPrice = 0;
extern string  c = "--CCI Inputs--";
extern int CCIPeriod = 14;
//---- buffers
double CCIBuffer[];
double RelBuffer[];
double DevBuffer[];
double MovBuffer[];

int    MA_Mode;
string strMAType;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   string short_name;
//---- 3 additional buffers are used for counting.
   IndicatorBuffers(4);
   SetIndexBuffer(1, RelBuffer);
   SetIndexBuffer(2, DevBuffer);
   SetIndexBuffer(3, MovBuffer);
//---- indicator lines
   SetIndexStyle(0, DRAW_LINE);
   SetIndexBuffer(0, CCIBuffer);
//----
   if(CCIPeriod <= 0)
       CCIPeriod = 14;
//----
   SetIndexDrawBegin(0, CCIPeriod);
  
//---- name for DataWindow and indicator subwindow label
switch (MA_Type)
   {
      case 1: strMAType="EMA"; MA_Mode=MODE_EMA; break;
      case 2: strMAType="SMMA"; MA_Mode=MODE_SMMA; break;
      case 3: strMAType="LWMA"; MA_Mode=MODE_LWMA; break;
      case 4: strMAType="LSMA"; break;
      default: strMAType="SMA"; MA_Mode=MODE_SMA; break;
   }
   short_name = "CCI-" +strMAType+ " (" +CCIPeriod + ") ";
   IndicatorShortName(short_name);
   SetIndexLabel(0, short_name);
//----
   return(0);
  }
  
//+------------------------------------------------------------------------+
//| LSMA - Least Squares Moving Average function calculation               |
//| LSMA_In_Color Indicator plots the end of the linear regression line    |
//+------------------------------------------------------------------------+

//+------------------------------------------------------------------+
//| LSMA with PriceMode                                              |
//| PrMode  0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2,    |
//| 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4  |
//+------------------------------------------------------------------+

double LSMA(int TimeFrame, int Rperiod, int prMode, int shift)
{
   int i, myShift;
   double sum, pr;
   int length;
   double lengthvar;
   double tmp;
   double wt;

   length = Rperiod;
 
   sum = 0;
   for(i = length; i >= 1  ; i--)
   {
     lengthvar = length + 1;
     lengthvar /= 3;
     tmp = 0;
     myShift = length - i + shift;
     switch (prMode)
     {
     case 0: pr = iClose(NULL,TimeFrame,myShift);break;
     case 1: pr = iOpen(NULL,TimeFrame,myShift);break;
     case 2: pr = iHigh(NULL,TimeFrame,myShift);break;
     case 3: pr = iLow(NULL,TimeFrame,myShift);break;
     case 4: pr = (iHigh(NULL,TimeFrame,myShift) + iLow(NULL,TimeFrame,myShift))/2;break;
     case 5: pr = (iHigh(NULL,TimeFrame,myShift) + iLow(NULL,TimeFrame,myShift) + iClose(NULL,TimeFrame,myShift))/3;break;
     case 6: pr = (iHigh(NULL,TimeFrame,myShift) + iLow(NULL,TimeFrame,myShift) + iClose(NULL,TimeFrame,myShift) + iClose(NULL,TimeFrame,myShift))/4;break;
     }
     tmp = ( i - lengthvar)*pr;
     sum+=tmp;
    }
    wt = sum*6/(length*(length+1));
    wt = MathFloor(wt/Point)*Point;
    
    return(wt);
}

//+------------------------------------------------------------------+
//| Commodity Channel Index                                          |
//+------------------------------------------------------------------+
int start()
  {
   int    i, k, counted_bars = IndicatorCounted();
   double price, sum, mul; 
   if(CCIPeriod <= 1)
       return(0);
   if(Bars <= CCIPeriod) 
       return(0);
//---- initial zero
   if(counted_bars < 1)
     {
       for(i = 1; i <= CCIPeriod; i++) 
           CCIBuffer[Bars-i] = 0.0;
       for(i = 1; i <= CCIPeriod; i++) 
           DevBuffer[Bars-i] = 0.0;
       for(i = 1; i <= CCIPeriod; i++) 
           MovBuffer[Bars-i] =0.0;
     }
//---- last counted bar will be recounted
   int limit = Bars - counted_bars;
   if(counted_bars > 0) 
       limit++;
//---- moving average
   for(i = 0; i < limit; i++)
   {
     if (MA_Type == 4)
      MovBuffer[i]=LSMA(0, CCIPeriod, MA_AppliedPrice,i);
     else
      MovBuffer[i]=iMA(NULL,0,CCIPeriod,0,MA_Mode,MA_AppliedPrice,i);
   }
//---- standard deviations
   i = Bars - CCIPeriod + 1;
   if(counted_bars > CCIPeriod - 1) 
       i = Bars - counted_bars - 1;
   mul = 0.015 / CCIPeriod;
   while(i >= 0)
     {
       sum = 0.0;
       k = i + CCIPeriod - 1;
       while(k >= i)
        {
          price =(High[k] + Low[k] + Close[k]) / 3;
          sum += MathAbs(price - MovBuffer[i]);
          k--;
        }
       DevBuffer[i] = sum*mul;
       i--;
     }
   i = Bars - CCIPeriod + 1;
   if(counted_bars > CCIPeriod - 1) 
       i = Bars - counted_bars - 1;
   while(i >= 0)
     {
       price = (High[i] + Low[i] + Close[i]) / 3;
       RelBuffer[i] = price - MovBuffer[i];
       i--;
     }
//---- cci counting
   i = Bars - CCIPeriod + 1;
   if(counted_bars > CCIPeriod - 1) 
       i = Bars - counted_bars - 1;
   while(i >= 0)
     {
       if(DevBuffer[i] == 0.0) 
           CCIBuffer[i] = 0.0;
       else 
           CCIBuffer[i] = RelBuffer[i] / DevBuffer[i];
       i--;
     }
//----
   return(0);
  }
//+------------------------------------------------------------------+