//+------------------------------------------------------------------+ 
//|                                             SR-RateIndicator.mq5 | 
///|                                      Copyright © 2007, Tinytjan |
//|                                                 tinytjan@mail.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, Tinytjan"
#property link      "tinytjan@mail.ru"
//---- indicator version number
#property version   "1.00"
//---- drawing indicator in a separate window
#property indicator_separate_window 
//---- number of indicator buffers 2
#property indicator_buffers 2 
//---- only one plot is used
#property indicator_plots   1
//+-----------------------------------+
//|  Indicator drawing parameters     |
//+-----------------------------------+
//---- drawing the indicator as a four-color histogram
#property indicator_type1 DRAW_COLOR_HISTOGRAM
//---- colors of the four-color histogram are as follows
#property indicator_color1 clrMagenta,clrPurple,clrGray,clrTeal,clrChartreuse
//---- indicator line is a solid one
#property indicator_style1 STYLE_SOLID
//---- Indicator line width is equal to 2
#property indicator_width1 2
//---- displaying the indicator label
#property indicator_label1 "SR-Rate"

//+-----------------------------------+
//|  INDICATOR INPUT PARAMETERS       |
//+-----------------------------------+
input uint WindowSize=20; //window width

input int inHighLevel=+20;
input int inLowLevel=-20;
//+-----------------------------------+
//---- Declaration of integer variables of data starting point
int min_rates_total;
//---- declaration of dynamic arrays that will further be 
// used as indicator buffers
double IndBuffer[],ColorIndBuffer[];
//+------------------------------------------------------------------+    
//|  Gauss algorithm description                                     |
//+------------------------------------------------------------------+    
#include <OneSideGaussian.mqh> 
//+------------------------------------------------------------------+    
//| Solar Winds indicator initialization function                    | 
//+------------------------------------------------------------------+  
void OnInit()
  {
//---- Initialization of variables of the start of data calculation
   min_rates_total=int(WindowSize);
   BuffersInit();

//---- set IndBuffer dynamic array as an indicator buffer
   SetIndexBuffer(0,IndBuffer,INDICATOR_DATA);
//---- performing the shift of beginning of indicator drawing
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total+1);
//---- setting the indicator values that won't be visible on a chart
   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
//---- indexing elements in the buffer as time series
   ArraySetAsSeries(IndBuffer,true);

//---- setting dynamic array as a color index buffer   
   SetIndexBuffer(1,ColorIndBuffer,INDICATOR_COLOR_INDEX);
//---- indexing elements in the buffer as time series
   ArraySetAsSeries(ColorIndBuffer,true);

//--- creation of the name to be displayed in a separate sub-window and in a pop up help
   IndicatorSetString(INDICATOR_SHORTNAME,"SR-Rate Indicator");
//--- determining the accuracy of displaying the indicator values
   IndicatorSetInteger(INDICATOR_DIGITS,0);
   
//---- the number of the indicator 2 horizontal levels   
   IndicatorSetInteger(INDICATOR_LEVELS,2);
//---- values of the indicator horizontal levels   
   IndicatorSetDouble(INDICATOR_LEVELVALUE,0,inHighLevel);
   IndicatorSetDouble(INDICATOR_LEVELVALUE,1,inLowLevel);
//---- magenta and blue colors are used for horizontal levels lines  
   IndicatorSetInteger(INDICATOR_LEVELCOLOR,0,clrMagenta);
   IndicatorSetInteger(INDICATOR_LEVELCOLOR,1,clrBlue);
//---- short dot-dash is used for the horizontal level line  
   IndicatorSetInteger(INDICATOR_LEVELSTYLE,0,STYLE_DASHDOTDOT);
   IndicatorSetInteger(INDICATOR_LEVELSTYLE,1,STYLE_DASHDOTDOT);
//---- end of initialization
  }
//+------------------------------------------------------------------+  
//| Solar Winds 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[],     // price array of price maximums for the indicator calculation
                const double& low[],      // price array of minimums of price for the indicator calculation
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---- Checking if the number of bars is sufficient for the calculation
   if(rates_total<min_rates_total) return(0);

//---- declaration of local variables 
   int limit,bar,clr;
   double Max,Min,Range,slow,shigh,res;

//--- calculations of the necessary amount of data to be copied and
//the limit starting index for loop of bars recalculation
   if(prev_calculated>rates_total || prev_calculated<=0)// checking for the first start of the indicator calculation
     {
      limit=rates_total-min_rates_total; // starting index for calculation of all bars
      IndBuffer[limit+1]=0.0;
     }
   else limit=rates_total-prev_calculated; // starting index for calculation of new bars

//---- indexing elements in arrays as time series  
   ArraySetAsSeries(high,true);
   ArraySetAsSeries(low,true);
   ArraySetAsSeries(open,true);
   ArraySetAsSeries(close,true);

//---- main loop of the indicator calculation
   for(bar=limit; bar>=0 && !IsStopped(); bar--)
     {
      Max=0;
      Min=999999999;

      for(int kkk=bar; kkk<int(bar+WindowSize); kkk++)
        {
         slow=Smooth_5(rates_total,PRICE_LOW,kkk,open,low,high,close);
         if(slow<Min) Min=slow;

         shigh=Smooth_5(rates_total,PRICE_HIGH,kkk,open,low,high,close);
         if(shigh>Max) Max=shigh;
        }

      Range=Max-Min;
      if(Range) res=200*(Smooth_5(rates_total,PRICE_WEIGHTED,bar,open,low,high,close)-Min)/Range-100.0;
      else res=0.0;
      IndBuffer[bar]=res;

      clr=2;

      if(res>0)
        {
         if(res>inHighLevel) clr=4;
         else clr=3;
        }
        
      if(res<0)
        {
         if(res<inLowLevel) clr=0;
         else clr=1;
        }
        
      ColorIndBuffer[bar]=clr;
     }
//----     
   return(rates_total);
  }
//+------------------------------------------------------------------+