FX5_SelfAdjustingRSI_v1.0[1]_v1

//+------------------------------------------------------------------+
//|                                         FX5_SelfAdjustingRSI.mq4 |
//|                                                              FX5 |
//|                                                    hazem@uk2.net |
//+------------------------------------------------------------------+
#property copyright "FX5"
#property link      "hazem@uk2.net"
//----
#property indicator_separate_window
#property indicator_minimum 1
#property indicator_maximum 100
#property indicator_buffers 3
#property indicator_level1  20
#property indicator_level2  50
#property indicator_level3  80
//---- input parameters
extern int    rsiPeriod=14;
extern double diviation=2;
extern bool   MA_Method=true;
extern color  rsiColor=Blue;
extern color  overBoughtColor=Red;
extern color  overSoldColor=Green;
//---- buffers
double rsi[];
double upperBorder[];
double lowerBorder[];
double absDiviation[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0, DRAW_LINE, EMPTY, EMPTY, rsiColor);
   SetIndexStyle(1, DRAW_LINE, EMPTY, EMPTY, overBoughtColor);
   SetIndexStyle(2, DRAW_LINE, EMPTY, EMPTY, overSoldColor);
//----   
   SetIndexBuffer(0, rsi);
   SetIndexBuffer(1, upperBorder);
   SetIndexBuffer(2, lowerBorder);
//----   
   SetIndexDrawBegin(0, rsiPeriod);
   SetIndexDrawBegin(1, rsiPeriod * 2);
   SetIndexDrawBegin(2, rsiPeriod * 2);
//----   
   SetIndexLabel(0, "RSI");
   SetIndexLabel(1, "OverBought");
   SetIndexLabel(2, "OverSold");
//----
   IndicatorShortName("FX5_SelfAdjustingRSI( " + rsiPeriod + " )");
   IndicatorBuffers(4);
   SetIndexBuffer(3, absDiviation);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int countedBars=IndicatorCounted();
//----   
   if(MA_Method==true)
      MovingAverageMethod(countedBars);
   else
      StandardDeviationMethod(countedBars);
//----         
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void MovingAverageMethod(int countedBars)
  {
   if(countedBars < 0)
      countedBars=0;
//----      
   for(int i=Bars - countedBars; i>=0; i--)
     {
      rsi[i]=iRSI(NULL, 0, rsiPeriod, PRICE_CLOSE, i);
      double smoothedRSI=GetSmoothedRSI(i);
      absDiviation[i]=MathAbs(rsi[i] - smoothedRSI);
      double kDiviation=diviation * GetAbsDiviationAverage(i);
      upperBorder[i]=50 + kDiviation;
      lowerBorder[i]=50 - kDiviation;
     }
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void StandardDeviationMethod(int countedBars)
  {
   if(countedBars < 0)
      countedBars=0;
//----
   for(int i=Bars - countedBars; i>=0; i--)
     {
      rsi[i]=iRSI(NULL, 0, rsiPeriod, PRICE_CLOSE, i);
      double rsiDiviation=iStdDevOnArray(rsi, 0, rsiPeriod, 0,
                                           MODE_SMA, i);
      double kDiviation=diviation * rsiDiviation;
      upperBorder[i]=50 + kDiviation;
      lowerBorder[i]=50 - kDiviation;
     }
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
double GetSmoothedRSI(int shift)
  {
   double sum=0;
   for(int i=shift; i < shift + rsiPeriod; i++)
     {
      sum+=rsi[i];
     }
   return(sum/rsiPeriod);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
double GetAbsDiviationAverage(int shift)
  {
   double sum=0;
   for(int i=shift; i < shift + rsiPeriod; i++)
     {
      sum+=absDiviation[i];
     }
   return(sum/rsiPeriod);
  }
//+------------------------------------------------------------------+