//+---------------------------------------------------------------------+
//|                                                    ChandeQStick.mq5 |
//|                              Copyright © 2006, TrendLaboratory Ltd. |
//|               http://finance.groups.yahoo.com/group/TrendLaboratory |
//|                                          E-mail: igorad2004@list.ru |
//+---------------------------------------------------------------------+ 
//| Place the SmoothAlgorithms.mqh file   |
//| in the directory: terminal_data_folder\MQL5\Include        |
//+---------------------------------------------------------------------+
#property copyright "Copyright © 2006, TrendLaboratory Ltd."
#property link      "http://finance.groups.yahoo.com/group/TrendLaboratory"
//---- Indicator version
#property version   "1.00"
//--- drawing the indicator in a separate window
#property indicator_separate_window 
//---- number of indicator buffers
#property indicator_buffers 2 
//---- one plot is used
#property indicator_plots   1
//+-----------------------------------+
//|  Parameters of indicator drawing  |
//+-----------------------------------+
//---- drawing indicator as a four-color histogram
#property indicator_type1 DRAW_COLOR_HISTOGRAM
//--- the following colors are used in the four color histogram
#property indicator_color1 clrDeepPink,clrViolet,clrGray,clrDeepSkyBlue,clrBlue
//--- Indicator line is a solid one
#property indicator_style1 STYLE_SOLID
//--- indicator line width is 2
#property indicator_width1 2
//--- displaying the indicator label
#property indicator_label1 "ChandeQStick"
//+-----------------------------------+
//|  CXMA class description           |
//+-----------------------------------+
#include <SmoothAlgorithms.mqh> 
//+-----------------------------------+
//--- declaration of the CXMA class variables from the SmoothAlgorithms.mqh file
CXMA XMA1;
//+-----------------------------------+
//|  Indicator input parameters       |
//+-----------------------------------+
input Smooth_Method XMA_Method=MODE_SMA; // Smoothing method
input uint XLength=8;                    // Smoothing depth                    
input int XPhase=15;                     // Smoothing parameter
// for JJMA it varies within the range -100 ... +100 and influences the quality of the transient period;
// For VIDIA, it is a CMO period, for AMA, it is a slow moving average period
input int Shift=0;                       // Horizontal shift of the indicator in bars
//+-----------------------------------+
//--- declaration of dynamic arrays that
//--- will be used as indicator buffers
double IndBuffer[],ColorIndBuffer[];
//--- declaration of the integer variables for the start of data calculation
int min_rates_total;
//+------------------------------------------------------------------+   
//| XMA indicator initialization function                            | 
//+------------------------------------------------------------------+ 
void OnInit()
  {
//--- initialization of variables of the start of data calculation
   min_rates_total=XMA1.GetStartBars(XMA_Method,XLength,XPhase)+1;

//--- Set dynamic array as an indicator buffer
   SetIndexBuffer(0,IndBuffer,INDICATOR_DATA);
//--- shifting the indicator 1 horizontally
   PlotIndexSetInteger(0,PLOT_SHIFT,Shift);
//--- shifting the start of drawing of the indicator
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total);
//--- setting the indicator values that won't be visible on a chart
   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0);

//--- set dynamic array as a color index buffer   
   SetIndexBuffer(1,ColorIndBuffer,INDICATOR_COLOR_INDEX);

//--- initializations of a variable for the indicator short name
   string shortname;
   string Smooth1=XMA1.GetString_MA_Method(XMA_Method);
   StringConcatenate(shortname,"ChandeQStick(",XLength,", ",Smooth1,")");
//--- Creation of the name to be displayed in a separate sub-window and in a pop up help
   IndicatorSetString(INDICATOR_SHORTNAME,shortname);

//--- Determining the accuracy of displaying the indicator values
   IndicatorSetInteger(INDICATOR_DIGITS,0);
//--- initialization end
  }
//+------------------------------------------------------------------+ 
//| XMA iteration function                                           | 
//+------------------------------------------------------------------+ 
int OnCalculate(const int rates_total,    // number of bars in history at the current tick
                const int prev_calculated,// amount of history in bars at the previous tick
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//--- checking if the number of bars is enough for the calculation
   if(rates_total<min_rates_total) return(0);

//--- declaration of variables with a floating point  
   double diff,xdiff;
//--- declaration of integer variables and getting already calculated bars
   int first,bar;

//--- calculation of the 'first' starting index for the bars recalculation loop
   if(prev_calculated>rates_total || prev_calculated<=0) // checking for the first start of calculation of an indicator
      first=1; // starting index for calculation of all bars
   else first=prev_calculated-1; // starting number for calculation of new bars

//--- main indicator calculation loop
   for(bar=first; bar<rates_total && !IsStopped(); bar++)
     {
      diff=(close[bar]-open[bar])/_Point;
      xdiff=XMA1.XMASeries(1,prev_calculated,rates_total,XMA_Method,XPhase,XLength,diff,bar,false);
      //---       
      IndBuffer[bar]=xdiff;
     }

   if(prev_calculated>rates_total || prev_calculated<=0)// Checking for the first start of the indicator calculation
      first++;
//--- main cycle of the indicator coloring
   for(bar=first; bar<rates_total && !IsStopped(); bar++)
     {
      int clr=2;

      if(IndBuffer[bar]>0)
        {
         if(IndBuffer[bar]>IndBuffer[bar-1]) clr=4;
         if(IndBuffer[bar]<IndBuffer[bar-1]) clr=3;
        }

      if(IndBuffer[bar]<0)
        {
         if(IndBuffer[bar]<IndBuffer[bar-1]) clr=0;
         if(IndBuffer[bar]>IndBuffer[bar-1]) clr=1;
        }

      ColorIndBuffer[bar]=clr;
     }
//---      
   return(rates_total);
  }
//+------------------------------------------------------------------+