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

//|                                                 RSIFilter_v1.mq4 

//|                                  Copyright © 2006, Forex-TSD.com 

//|                         Written by IgorAD,igorad2003@yahoo.co.uk 
   
//|            http://finance.groups.yahoo.com/group/TrendLaboratory 
                                      
//+------------------------------------------------------------------

#property copyright "Copyright © 2006, Forex-TSD.com "
#property link      "http://www.forex-tsd.com/"

#property indicator_separate_window
#property indicator_minimum -1
#property indicator_maximum 1
#property indicator_buffers 4
#property indicator_color1 White
#property indicator_color2 Yellow
#property indicator_color3 Blue
#property indicator_color4 Blue

//---- input parameters
extern int PeriodRSI=8;
//---- indicator buffers
double UpBuffer[];
double DnBuffer[];
double UpsBuffer[];
double DnsBuffer[];

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

//| Custom indicator initialization function                         

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

int           Chart_Scale,nn,Bar_Width1;//,counted_bars,limit; 
bool          Deinitialized;
bool          Alert_Allowed;
static bool   allow = true;
static bool   disallow = false; 


//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init() {
  
   Deinitialized = false;   
  
  //Determine the current chart scale (chart scale number should be 0-5)
  Chart_Scale = ChartScaleGet();
  
  //Set bar widths             
        if(Chart_Scale == 0) {Bar_Width1 = 1;}
  else {if(Chart_Scale == 1) {Bar_Width1 = 1;}      
  else {if(Chart_Scale == 2) {Bar_Width1 = 2;}
  else {if(Chart_Scale == 3) {Bar_Width1 = 4;}
  else {if(Chart_Scale == 4) {Bar_Width1 = 8;}//6
  else {Bar_Width1 = 16;} }}}}//12  
  
  
     //string short_name;
//---- indicator line
   SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,Bar_Width1);
   SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,Bar_Width1);
   SetIndexStyle(2,DRAW_HISTOGRAM,STYLE_SOLID,Bar_Width1);
   SetIndexStyle(3,DRAW_HISTOGRAM,STYLE_SOLID,Bar_Width1);
   SetIndexBuffer(0,UpBuffer);
   SetIndexBuffer(1,DnBuffer);
   SetIndexBuffer(2,UpsBuffer);
   SetIndexBuffer(3,DnsBuffer);
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
//---- name for DataWindow and indicator subwindow label
  // short_name="RSI Filter("+PeriodRSI+")  (Down trade only when down bars are orange)";
   IndicatorShortName("RSI Filter");
   SetIndexLabel(0,"UpTrend");
   SetIndexLabel(1,"DownTrend");
//----
   SetIndexDrawBegin(0,PeriodRSI);
   SetIndexDrawBegin(1,PeriodRSI);
   SetIndexDrawBegin(2,PeriodRSI);
   SetIndexDrawBegin(3,PeriodRSI);



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

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

//| RSIFilter_v1                                                     

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

int start()
  {
   int shift,trend;
   double RSI0;

   
   for(shift=Bars-PeriodRSI-1;shift>=0;shift--)
   {	
   RSI0=iRSI(NULL,0,PeriodRSI,PRICE_CLOSE,shift);
   	
	  if (RSI0>50)  trend=1; 
	  if (RSI0<50)  trend=-1;
	  
	  if (trend>0) 
	  {
	  if (RSI0 > 50 && RSI0 < 80) UpBuffer[shift]=1.0;
	  else UpBuffer[shift] = EMPTY_VALUE;
	  DnBuffer[shift]=0;
	 // UpsBuffer[shift]=0;
	 // DnsBuffer[shift]=0;
	  }
	  	  
	  if (trend<0) 
	  {
	  if (RSI0 < 50 && RSI0 > 20) DnBuffer[shift]=-1.0;
	  else DnBuffer[shift] = EMPTY_VALUE;
	  UpBuffer[shift]=0;
	  //UpsBuffer[shift]=0;
	  //DnsBuffer[shift]=0;  
	  }
	  
	  
	  	  if (trend>0) 

	  {
	  
	  if (RSI0 > 80 && RSI0 < 100) UpsBuffer[shift]=1.0;
	  else UpsBuffer[shift] = EMPTY_VALUE;
	  //DnBuffer[shift]=0;
	  //UpBuffer[shift]=0;
	  DnsBuffer[shift]=0;	  
	  }
	  
	  if (trend<0) 
	  {
	  if (RSI0 < 20 && RSI0 > 0) DnsBuffer[shift]=-1.0;
	  else DnsBuffer[shift] = EMPTY_VALUE;
	  //DnBuffer[shift]=0;
	  //UpBuffer[shift]=0;
	  UpsBuffer[shift]=0;
	  }
	  
	  
	  
	  
}
	return(0);	
 }

void OnChartEvent(const int id, const long &lparam, const double &dparam, const string &sparam)                                                    
  {
  Chart_Scale = ChartScaleGet();
  if(Alert_Allowed == allow)
    {
   init();
    Alert_Allowed = allow;
    }
  else
    {
    init();
    Alert_Allowed = disallow;
    }          
  }

//+-------------------------------------------------------------------------------------------+
//| Subroutine:  Get the chart scale number                                                   |
//+-------------------------------------------------------------------------------------------+



int ChartScaleGet()
  {
  long result = -1;
  ChartGetInteger(0,CHART_SCALE,0,result);
  return((int)result); return(0);
}



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