Gold_Silver_Ratio

//+------------------------------------------------------------------+
//|                                            Gold_Silver_Ratio.mq4 |
//|                                 Copyright © 2010, Forex-Experts. |
//|                                     http://www.forex-experts.com |
//+------------------------------------------------------------------+


#property copyright "Copyright © 2010, Forex-Experts"
#property link "http://www.forex-experts.com"

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 CLR_NONE
#property indicator_color2 CLR_NONE

extern string 	 Symbol1="XAUUSD";
extern string 	 Symbol2="XAGUSD";
extern color	 BarColor = Red;
extern color	 BarWidth = 3;
extern int		 NumBars = 1000;

//---- buffers


double HighBuffer[];
double LowBuffer[];



int k=0;


//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{

//---- indicators
IndicatorBuffers(2);
SetIndexStyle(0,DRAW_NONE,EMPTY,0);
SetIndexBuffer(0, HighBuffer);

SetIndexStyle(1,DRAW_NONE,EMPTY,0);
SetIndexBuffer(1, LowBuffer);

//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//---- TODO: add your code here
string ea=WindowExpertName();
int window=WindowFind(ea);

ObjectsDeleteAll(window,OBJ_TREND);

//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{



int limit;
int counted_bars=IndicatorCounted();

if (counted_bars<0) return (-1);
if (counted_bars>0) counted_bars--;
limit=(Bars-counted_bars)-1;
limit=NumBars;

for(k=limit; k>=0; k--) {
	double high2=iHigh(Symbol2,0,k);
	double low2=iLow(Symbol2,0,k);
	if (high2==0 || low2==0)  continue;	
	double high_ratio=iHigh(Symbol1,0,k)/high2;
	double low_ratio=iLow(Symbol1,0,k)/low2;
	HighBuffer[k]=high_ratio;
	LowBuffer[k]=low_ratio;
 	DrawLine("bar_"+Time[k], k, high_ratio, k , low_ratio, BarColor, 0, BarWidth, false);				
}




//----
return(0);
}




void DrawLine(string _name, int _startbar, double _start_y, int _endbar, double _end_y, int _color, int _style=0, int _width=5, bool _ray=false) {
string ea=WindowExpertName();
int window=WindowFind(ea);


int _x1=Time[_startbar];
int _x2=Time[_endbar];


double _y1=_start_y;
double _y2=_end_y;


if(ObjectFind(_name) != 0) {
   ObjectCreate(_name,OBJ_TREND,window,_x1,_y1,_x2,_y2);
   ObjectSet(_name,OBJPROP_RAY,_ray); 
   ObjectSet(_name,OBJPROP_COLOR,_color); 
   ObjectSet(_name,OBJPROP_WIDTH,_width); 
   ObjectSet(_name,OBJPROP_STYLE,_style); 

}
else
{
   ObjectSet(_name,OBJPROP_RAY,_ray); 
   ObjectMove(_name,0,_x1,_y1);
   ObjectMove(_name,1,_x2,_y2);
   ObjectSet(_name,OBJPROP_COLOR,_color); 
   ObjectSet(_name,OBJPROP_WIDTH,_width); 
   ObjectSet(_name,OBJPROP_STYLE,_style); 
}                  

return;
}