//SR

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 MediumSeaGreen
#property indicator_color2 OrangeRed
//---- input parameters
 extern double k_std = 1.0;
//---- buffers
double Buffer[];
double Buffer1[];    
double m[10000];
double o[10000];
datetime t = 0;
int l;
//-----------------------------------
int init()
  {
//---- indicators
//---- 1 additional buffer used for counting.
     IndicatorBuffers( 2 );
     IndicatorDigits( Digits );
//---- indicator line
     SetIndexStyle( 0, DRAW_LINE );
     SetIndexBuffer( 0, Buffer );
     SetIndexStyle( 1, DRAW_LINE );
     SetIndexBuffer( 1, Buffer1 );     
     string short_name = " GSV (9 / 14)";
     IndicatorShortName( short_name );
     SetIndexLabel( 0, short_name );
     SetIndexLabel( 1, short_name );         
//----
   return(0);
  }
  
//-------------------------------

int start()
  {
//----
   int counted_bars=IndicatorCounted();
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
   int limit=Bars-counted_bars;
   if(counted_bars==0) limit-=2; 
   
    if ( t != Time[0] || l == 0 )
    {
     t = Time[0];
     l = 1;
     int i, x;
     double LastHigh, LastLow;
   
     //for ( i = Bars - 1; i >= 0; i-- )
     for ( i = limit; i >= 0; i-- )
     { 
       if ( High[i+1] > LastHigh )
       { 
        LastHigh = High[i+1];
       }
       //----
       if ( Low[i+1] < LastLow )
       { 
        LastLow = Low[i+1];
       }
         if ( TimeDay( Time[i] ) != TimeDay( Time[i+1] ) )
         { 
           x++;
           o[x] = Open[i];
           m[x] = LastHigh - o[x - 1];
           
              if ( LastHigh - o[x - 1] > o[x - 1] - LastLow )
              {
               m[x] = o[x - 1] - LastLow;
              }
                 LastLow = 100000; 
                 LastHigh = 0;
             
             if ( x > 15 )
             {
              double a1 = m[x];
              double a2 = m[x-1]; 
              double a3 = m[x-2];
              double a4 = m[x-3];          
              double a5 = m[x-4];
              double a6 = m[x-5];          
              double a7 = m[x-6];
              double a8 = m[x-7];          
              double a9 = m[x-8];
              double a10 = m[x-9];          
              double a11 = m[x-10];          
              double a12 = m[x-11];          
              double a13 = m[x-12];          
              double a14 = m[x-13];
                              
              double ax = 0.1111111 * ( a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 );
              double ay = 0.0714285 * ( a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11 + a12 + a13 + a14 );
             
              double stx = 0.1111111 * ( ( a1 - ax ) * ( a1 - ax ) + ( a2 - ax ) * ( a2 - ax ) + ( a3 - ax ) * ( a3 - ax ) + 
                ( a4 - ax ) * ( a4 - ax ) + ( a5 - ax ) * ( a5 - ax ) + ( a6 - ax ) * ( a6 - ax ) + ( a7 - ax ) * ( a7 - ax ) 
                 + ( a8 - ax ) * ( a8 - ax ) + ( a9 - ax ) * ( a9 - ax ) ); 
                   
              double sty = 0.0714285 * ( ( a1 - ay ) * ( a1 - ay ) + ( a2 - ay ) * ( a2 - ay ) + ( a3 - ay ) * ( a3 - ay ) + 
                ( a4 - ay ) * ( a4 - ay ) + ( a5 - ay ) * ( a5 - ay ) + ( a6 - ay ) * ( a6 - ay ) + ( a7 - ay ) * ( a7 - ay ) 
              + ( a8 - ay ) * ( a8 - ay ) + ( a9 - ay ) * ( a9 - ay ) + ( a10 - ay ) * ( a10 - ay ) + ( a11 - ay ) * ( a11 - ay )
              + ( a12 - ay ) * ( a12 - ay ) + ( a13 - ay ) * ( a13 - ay ) + ( a14 - ay ) * ( a14 - ay ) );  
                            
                  double st1 = ax + k_std * MathPow( stx, 0.5 );
                  double st2 = ay + k_std * MathPow( sty, 0.5 );
                  
                  double std = st2;
                  if ( st1 > st2 )
                  {
                   std = st1;
                  }
                     double g1 = o[x] + std;
                     double g2 = o[x] - std;          
             } 
          } 
           
          if ( x > 15 )
          {
           Buffer[i] = g1;
           Buffer1[i] = g2;
          }
        
       }
     
    }    
//----
       
       
       
   return(0);
  }