CCI_Angle

//+------------------------------------------------------------------+
//|                                                    CCI_Angle.mq4 |
//|                                                           MrPip  |
//|                                                                  |
//| You can use this indicator to measure when the LSMA angle is     |
//| "near zero". AngleTreshold determines when the angle for the     |
//| LSMA is "about zero": This is when the value is between          |
//| [-AngleTreshold, AngleTreshold] (or when the histogram is red).  |
//|   LSMAPeriod: LSMA period                                        |
//|   AngleTreshold: The angle value is "about zero" when it is      |
//|     between the values [-AngleTreshold, AngleTreshold].          |      
//|   StartLSMAShift: The starting point to calculate the            |   
//|     angle. This is a shift value to the left from the            |
//|     observation point. Should be StartEMAShift > EndEMAShift.    | 
//|   EndLSMAShift: The ending point to calculate the                |
//|     angle. This is a shift value to the left from the            | 
//|     observation point. Should be StartEMAShift > EndEMAShift.    |
//|                                                                  |
//|   Modified by MrPip from EMAAngle by jpkfox                      |                                              |
//|       Red for down                                               |
//|       Yellow for near zero                                       |
//|       Green for up                                               |   
//|                                                                  |
//| Modified to do CCI Angle                                         |
//+------------------------------------------------------------------+

#property  copyright "Robert L. Hill aka MrPip"
//---- indicator settings
#property  indicator_separate_window
#property  indicator_buffers 3
#property  indicator_color1  LimeGreen
#property  indicator_color2  Yellow
#property  indicator_color3 FireBrick
//---- indicator parameters
extern int CCIPeriod=14;
extern double AngleTreshold=15.0;
extern int PrevShift=4;
extern int CurShift=0;

//---- indicator buffers
double UpBuffer[];
double DownBuffer[];
double ZeroBuffer[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(3);
//---- drawing settings
   SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,2);
   SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,2);
   SetIndexStyle(2,DRAW_HISTOGRAM,STYLE_SOLID,2);

   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+2);

//---- 3 indicator buffers mapping
   if(!SetIndexBuffer(0,UpBuffer) &&
      !SetIndexBuffer(1,DownBuffer) &&
      !SetIndexBuffer(2,ZeroBuffer))
      Print("cannot set indicator buffers!");
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("CCI_Angle("+CCIPeriod+","+AngleTreshold+","+PrevShift+","+CurShift+")");
//---- initialization done
   return(0);
}



//+------------------------------------------------------------------+
//| The angle for LSMA                                               |
//+------------------------------------------------------------------+
int start()
{
   double fCur, fPrev;
   double fAngle, mFactor;
   int nLimit, i;
   int nCountedBars;
   double angle;
   int ShiftDif;
 
   if(CurShift >= PrevShift)
   {
      Print("Error: CurShift >= PrevShift");
      PrevShift = 6;
      CurShift = 0;      
   }  
         
   nCountedBars = IndicatorCounted();
//---- check for possible errors
   if(nCountedBars<0) 
      return(-1);
//---- last counted bar will be recounted
   if(nCountedBars>0) 
      nCountedBars--;
   nLimit = Bars-nCountedBars;

   mFactor = 1.0;
   ShiftDif = PrevShift-CurShift;
   mFactor /= ShiftDif; 
 
//---- main loop
   for(i=0; i<nLimit; i++)
   {
      fCur=iCCI(NULL, 0, CCIPeriod, PRICE_CLOSE, i+CurShift);
      fPrev=iCCI(NULL, 0, CCIPeriod, PRICE_CLOSE, i+PrevShift);
      // 10000.0 : Multiply by 10000 so that the fAngle is not too small
      // for the indicator Window.
      fAngle = mFactor * (fCur - fPrev)/2;

      DownBuffer[i] = 0.0;
      UpBuffer[i] = 0.0;
      ZeroBuffer[i] = 0.0;
      
      if(fAngle > AngleTreshold)
         UpBuffer[i] = fAngle;
      else if (fAngle < -AngleTreshold)
         DownBuffer[i] = fAngle;
      else ZeroBuffer[i] = fAngle;
   }

   return(0);
  }
//+------------------------------------------------------------------+