/*
   This indicator was created by Kalenzo
   email: bartlomiej.gorski@gmail.com
   web: http://www.fxservice.eu
   
   The base for this indicator was orginal RSI attached with Metatrader.
*/
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"

#property indicator_separate_window
#property indicator_minimum -10
#property indicator_maximum 100
#property indicator_buffers 6
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 Green
#property indicator_color4 Magenta
#property indicator_color5 DodgerBlue
#property indicator_color6 BlueViolet

//---- input parameters
extern int RSIOMA          = 14;
extern int RSIOMA_MODE     = MODE_EMA;
extern int RSIOMA_PRICE    = PRICE_CLOSE;

extern int Ma_RSIOMA       = 21,
           Ma_RSIOMA_MODE  = MODE_EMA;

extern int BuyTrigger      = 80;
extern int SellTrigger     = 20;

extern color BuyTriggerColor  = DodgerBlue;
extern color SellTriggerColor = Magenta;

extern int MainTrendLong   = 50;
extern int MainTrendShort  = 50;

extern color MainTrendLongColor     = Red;
extern color MainTrendShortColor    = Green;

//---- buffers
double RSIBuffer[];
double PosBuffer[];
double NegBuffer[];

double bdn[],bup[];
double sdn[],sup[];

double marsioma[];
string short_name;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   short_name = StringConcatenate("RSIOMA(",RSIOMA,")");   
   IndicatorBuffers(8);
   
   SetIndexBuffer(0,RSIBuffer);
   SetIndexBuffer(2,bup);
   SetIndexBuffer(1,bdn);
   SetIndexBuffer(3,sdn);
   SetIndexBuffer(4,sup);
   SetIndexBuffer(5,marsioma);
   
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,3);
   SetIndexStyle(2,DRAW_HISTOGRAM,STYLE_SOLID,1);
   SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,1);
   SetIndexStyle(3,DRAW_HISTOGRAM,STYLE_SOLID,1);
   SetIndexStyle(4,DRAW_HISTOGRAM,STYLE_SOLID,1);
   SetIndexStyle(5,DRAW_LINE,STYLE_SOLID,1);
   
   SetIndexBuffer(6,PosBuffer);
   SetIndexBuffer(7,NegBuffer);
      
   IndicatorShortName(short_name);

   SetIndexDrawBegin(0,RSIOMA);
   SetIndexDrawBegin(1,RSIOMA);
   SetIndexDrawBegin(2,RSIOMA);
   SetIndexDrawBegin(3,RSIOMA);
   SetIndexDrawBegin(4,RSIOMA);
   SetIndexDrawBegin(5,RSIOMA);
   SetIndexDrawBegin(6,RSIOMA);
   SetIndexDrawBegin(7,RSIOMA);
//----

   drawLine(BuyTrigger,"BuyTrigger", BuyTriggerColor);
   drawLine(SellTrigger,"SellTrigger", SellTriggerColor );
   drawLine(MainTrendLong,"MainTrendLong", MainTrendLongColor );
   drawLine(MainTrendShort,"MainTrendShort",MainTrendShortColor );

   return(0);
  }
//+------------------------------------------------------------------+
//| Relative Strength Index                                          |
//+------------------------------------------------------------------+
int start()
  {
   
  
   
   int    i,counted_bars=IndicatorCounted();
   double rel,negative,positive;
//----
   if(Bars<=RSIOMA) return(0);
//---- initial zero
   if(counted_bars<1)
      for(i=1;i<=RSIOMA;i++) RSIBuffer[Bars-i]=0.0;
//----
   i=Bars-RSIOMA-1;
   int ma = i;
   if(counted_bars>=RSIOMA) i=Bars-counted_bars-1;
   while(i>=0)
     {
      double sumn=0.0,sump=0.0;
      if(i==Bars-RSIOMA-1)
        {
         int k=Bars-2;
         //---- initial accumulation
         while(k>=i)
           {
            
            double cma = iMA(Symbol(),0,RSIOMA,0,RSIOMA_MODE,RSIOMA_PRICE,k);
            double pma = iMA(Symbol(),0,RSIOMA,0,RSIOMA_MODE,RSIOMA_PRICE,k+1);
            
            rel=cma-pma;
            
            if(rel>0) sump+=rel;
            else      sumn-=rel;
            k--;
           }
         positive=sump/RSIOMA;
         negative=sumn/RSIOMA;
        }
      else
        {
         //---- smoothed moving average
         double ccma = iMA(Symbol(),0,RSIOMA,0,RSIOMA_MODE,RSIOMA_PRICE,i);
         double ppma = iMA(Symbol(),0,RSIOMA,0,RSIOMA_MODE,RSIOMA_PRICE,i+1);
            
         rel=ccma-ppma;
         
         if(rel>0) sump=rel;
         else      sumn=-rel;
         positive=(PosBuffer[i+1]*(RSIOMA-1)+sump)/RSIOMA;
         negative=(NegBuffer[i+1]*(RSIOMA-1)+sumn)/RSIOMA;
        }
      PosBuffer[i]=positive;
      NegBuffer[i]=negative;
      if(negative==0.0) RSIBuffer[i]=0.0;
      else
      {
          RSIBuffer[i]=100.0-100.0/(1+positive/negative);
          
          bdn[i] = 0;
          bup[i] = 0;
          sdn[i] = 0;
          sup[i] = 0;
          
          if(RSIBuffer[i]>MainTrendLong)
          bup[i] = -10;
          
          if(RSIBuffer[i]<MainTrendShort)
          bdn[i] = -10;
          
          if(RSIBuffer[i]<20 && RSIBuffer[i]>RSIBuffer[i+1])
          sup[i] = -10;
          
          if(RSIBuffer[i]>80 && RSIBuffer[i]<RSIBuffer[i+1])
          sdn[i] = -10;
            
          
      }    
      i--;
     }
     
     while(ma>=0)
     {
         marsioma[ma] = iMAOnArray(RSIBuffer,0,Ma_RSIOMA,0,Ma_RSIOMA_MODE,ma); 
         ma--;
     }    
     
//----
   return(0);
  }
//+------------------------------------------------------------------+
void drawLine(double lvl,string name, color Col )
{
      
            ObjectDelete(name);
            ObjectCreate(name, OBJ_HLINE, WindowFind(short_name), Time[0], lvl,Time[0],lvl);
            
            
            ObjectSet(name, OBJPROP_STYLE, STYLE_DOT);
            
            ObjectSet(name, OBJPROP_COLOR, Col);        
            ObjectSet(name,OBJPROP_WIDTH,1);
          
 
}