//+------------------------------------------------------------------+
//|                                        Multi pair Stochastic.mq4 |
//|                                                           mladen |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "mladen"
#property link      ""

#property indicator_separate_window
#property  indicator_buffers 4
#property indicator_minimum  0
#property indicator_maximum  100
#property  indicator_color1  Gold
#property  indicator_color2  Red
#property  indicator_color3  DimGray
#property  indicator_color4  DimGray
#property  indicator_style2  STYLE_DOT
#property  indicator_style3  STYLE_DOT
#property  indicator_style4  STYLE_DOT

//---- input parameters
//
//
//
//

extern string    pairs       = "EURUSD;GBPUSD;USDCAD";
extern int       barsPerPair = 30;
extern string    stochastic  = "parameters";
extern int       KPeriod     =  8;
extern int       DPeriod     =  3;
extern int       Slowing     =  3;
extern int       levelUp     = 80;
extern int       levelDown   = 20;
extern string    text        = "color";
extern color     textColor   = Silver;
extern color     backColor   = C'48,48,48';

//---- buffers
//
//
//
//

double   ind_buffer1[];
double   ind_buffer2[];
double   ind_buffer3[];
double   ind_buffer4[];

//
//
//
//
//

string   aPairs[];
string   shortName;
string   labelNames = "multiStochastic";
int      window;  
int      add;



//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+

int init()
{
   IndicatorBuffers(7);
   SetIndexBuffer(0,ind_buffer1);
   SetIndexBuffer(1,ind_buffer2);
   SetIndexBuffer(2,ind_buffer3);
   SetIndexBuffer(3,ind_buffer4);

   //
   //
   //
   //
   //
   
   SetIndexStyle(0,DRAW_LINE); 
   SetIndexStyle(1,DRAW_LINE);
   SetIndexStyle(2,DRAW_LINE); 
   SetIndexStyle(3,DRAW_LINE); 

   //
   //
   //    convert pairs to array
   //
   //

      pairs = StringUpperCase(StringTrimLeft(StringTrimRight(pairs)));
      if (StringSubstr(pairs,StringLen(pairs),1) != ";")
                       pairs = StringConcatenate(pairs,";");

         //
         //
         //
         //
         //                                   
            
         int s =  0;
         int i =  StringFind(pairs,";",s);
         string current;
         string temp;
            while (i > 0)
            {
               current = StringSubstr(pairs,s,i-s);
               if (iClose(current,0,0) > 0)
                  {
                     ArrayResize(aPairs,ArraySize(aPairs)+1);
                                 aPairs[ArraySize(aPairs)-1] = current;
                                 if (current == Symbol())
                                 {
                                       temp      = aPairs[0];
                                       aPairs[0] = current;
                                       aPairs[ArraySize(aPairs)-1] = temp;
                                 }                                       
                  }
                  s = i + 1;
                  i = StringFind(pairs,";",s);
            }

   //
   //
   //
   //
   //
 
      shortName = "Multi Stochastic ("+KPeriod+","+DPeriod+","+Slowing+")";
      IndicatorShortName(shortName);
 
   //
   //
   //
   //
   //
   
   return(0);
}


//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+

int deinit()
{
   for (int i = 0; i < ArraySize(aPairs); i++) { 
         ObjectDelete(labelNames+window+i);
         ObjectDelete(labelNames+window+i+i);
      }         
   return(0);
}


//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
{
   static bool init = false;
   int    limit     = ArraySize(aPairs);
   int    i,k;
   
   //
   //
   //
   //
   //

   if (!init) {
        init      = true;
        window    = WindowFind(shortName);  
        shortName = "Multi Stochastic - "+window+" ("+KPeriod+","+DPeriod+","+Slowing+")";
            IndicatorShortName(shortName);
      }            

   //
   //
   //
   //
   //

         k = 0; for (i=0; i<limit; i++) k = calculateStoch(aPairs[i],barsPerPair,k,i);

   //
   //
   //
   //
   //

   for (i=0;i<6;i++) SetIndexDrawBegin(i,Bars-k);
   return(0);
}


//+------------------------------------------------------------------+
//+                                                                  +
//+------------------------------------------------------------------+

bool isSignalCrossing(int shift)
{
   double curr = (ind_buffer1[shift]   - ind_buffer2[shift]);
   double prev = (ind_buffer1[shift+1] - ind_buffer2[shift+1]); 
   
   return(((curr>0) && (prev<0)) || ((curr<0) && (prev>0)));
}

//+------------------------------------------------------------------+
//+                                                                  +
//+------------------------------------------------------------------+

int calculateStoch(string symbol,int limit,int shift,int element)
{
   bool   signalCrossing = false;
   bool   stochCrossing  = false;
   double max;
   int    i;

   //
   //
   //
   //
   //

   for(i=0; i<limit; i++) {
      ind_buffer1[shift+i]=iStochastic(symbol,0,KPeriod,DPeriod,Slowing,0,0,0,i);
      ind_buffer2[shift+i]=iStochastic(symbol,0,KPeriod,DPeriod,Slowing,0,0,1,i);
      ind_buffer3[shift+i]=levelUp;
      ind_buffer4[shift+i]=levelDown;
   }            

   
   //
   //
   //
   //
   //

   for (i=0;i<6;i++) {
         ind_buffer1[shift+limit+i] = EMPTY_VALUE;                     
         ind_buffer2[shift+limit+i] = EMPTY_VALUE;                     
         ind_buffer3[shift+limit+i] = EMPTY_VALUE;                     
         ind_buffer4[shift+limit+i] = EMPTY_VALUE;                     
      }         

   //
   //
   //
   //
   //
   
   signalCrossing = isSignalCrossing(shift);
   createLabel(symbol,element,shift+limit+4,signalCrossing);
   return(shift+limit+5);
}



//+------------------------------------------------------------------+
//+                                                                  +
//+------------------------------------------------------------------+
//
//
//
//
//

void createLabel(string symbol,int element, int shift, bool signalCrossing)
{
   string name = labelNames+window+element;
   double price1;
   double price2;
   
   
   //
   //
   //
   //
   //
   
   price1 = 100;
   price2 = 0;
   
   //
   //
   //
   //
   //
   
   if (ObjectFind(name) == -1)
      {
         ObjectCreate(name,OBJ_TEXT,window,0,0);
         ObjectSet(name,OBJPROP_ANGLE,90);
         ObjectSetText(name,symbol);
      }
      ObjectSet(name,OBJPROP_TIME1 ,Time[shift]);
      ObjectSet(name,OBJPROP_PRICE1,(price1+price2)/2);
      if (signalCrossing)
           ObjectSet(name,OBJPROP_COLOR,Gold);
      else ObjectSet(name,OBJPROP_COLOR,textColor);

   //
   //
   //
   //
   //

 
   name = labelNames+window+element+element;
   if (ObjectFind(name) == -1)
      {
         ObjectCreate(name,OBJ_RECTANGLE,window,0,0,0,0);
         ObjectSet(name,OBJPROP_COLOR,backColor);
      }         
      ObjectSet(name,OBJPROP_TIME1,Time[shift]);
      ObjectSet(name,OBJPROP_PRICE1,price1);
      ObjectSet(name,OBJPROP_TIME2,Time[shift-4]);
      ObjectSet(name,OBJPROP_PRICE2,price2);
}

//+------------------------------------------------------------------+
//+                                                                  +
//+------------------------------------------------------------------+
//
//
//
//
//


string StringUpperCase(string str)
{
   string   s = str;
   int      lenght = StringLen(str) - 1;
   int      char;
   
   while(lenght >= 0)
      {
         char = StringGetChar(s, lenght);
         
         //
         //
         //
         //
         //
         
         if((char > 96 && char < 123) || (char > 223 && char < 256))
                  s = StringSetChar(s, lenght, char - 32);
          else 
              if(char > -33 && char < 0)
                  s = StringSetChar(s, lenght, char + 224);
                  
         //
         //
         //
         //
         //
                                 
         lenght--;
   }
   
   //
   //
   //
   //
   //
   
   return(s);
}