//+------------------------------------------------------------------+
//|                                            AsymmetricStochNR.mq5 | 
//|                                    Copyright © 2010,   Svinozavr | 
//+------------------------------------------------------------------+
//| Place the SmoothAlgorithms.mqh file                              |
//| to the directory: terminal_data_folder\MQL5\Include              |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010,   Svinozavr"
#property link ""
#property description "Asymmetric Stoch NR"
//---- indicator version
#property version   "1.00"
//---- drawing the indicator in a separate window
#property indicator_separate_window
//---- number of indicator buffers 2
#property indicator_buffers 2 
//---- only two plots are used
#property indicator_plots   2
//+----------------------------------------------+
//|  Declaration of constants                    |
//+----------------------------------------------+
#define RESET 0 // the constant for getting the command for the indicator recalculation back to the terminal
//+-----------------------------------+
//|  Indicator drawing parameters     |
//+-----------------------------------+
//---- drawing the indicator as a line
#property indicator_type1   DRAW_LINE
//---- DeepPink color is used for the indicator line
#property indicator_color1 DeepPink
//---- the indicator line is a continuous curve
#property indicator_style1  STYLE_DASHDOTDOT
//---- indicator line width is equal to 1
#property indicator_width1  1
//---- displaying the indicator label
#property indicator_label1  "Asymmetric Stochastic NR"
//+-----------------------------------+
//|  Indicator drawing parameters     |
//+-----------------------------------+
//---- drawing the indicator as a line
#property indicator_type2   DRAW_LINE
//---- teal color is used for the indicator line
#property indicator_color2 Teal
//---- the indicator line is a dot-dash one
#property indicator_style2  STYLE_SOLID
//---- indicator line width is equal to 1
#property indicator_width2  1
//---- displaying the indicator label
#property indicator_label2  "Signal"
//+----------------------------------------------+
//| Horizontal levels display parameters         |
//+----------------------------------------------+
#property indicator_level1       70.0
#property indicator_level2       30.0
#property indicator_levelcolor DarkOrchid
#property indicator_levelstyle STYLE_DASHDOTDOT
//+-----------------------------------+
//|  CXMA class description           |
//+-----------------------------------+
#include <SmoothAlgorithms.mqh> 
//+-----------------------------------+
//---- declaration of the CXMA class variables from the SmoothAlgorithms.mqh file
CXMA XMA;
//+-----------------------------------+
//|  Declaration of enumerations      |
//+-----------------------------------+
/*enum Smooth_Method is declared in the SmoothAlgorithms.mqh file
  {
   MODE_SMA_,  // SMA
   MODE_EMA_,  // EMA
   MODE_SMMA_, // SMMA
   MODE_LWMA_, // LWMA
   MODE_JJMA,  // JJMA
   MODE_JurX,  // JurX
   MODE_ParMA, // ParMA
   MODE_T3,    // T3
   MODE_VIDYA, // VIDYA
   MODE_AMA,   // AMA
  }; */
//+-----------------------------------+
//|  Declaration of enumeration       |
//+-----------------------------------+  
enum WIDTH
  {
   Width_1=1, // 1
   Width_2,   // 2
   Width_3,   // 3
   Width_4,   // 4
   Width_5    // 5
  };
//+-----------------------------------+
//|  Declaration of enumeration       |
//+-----------------------------------+
enum STYLE
  {
   SOLID_,       // Solid line
   DASH_,        // Dashed line
   DOT_,         // Dotted line
   DASHDOT_,     // Dot-dash line
   DASHDOTDOT_   // Dot-dash line with double dots
  };
//+-----------------------------------+
//|  Indicator input parameters       |
//+-----------------------------------+
input uint KperiodShort=5;                   // %K period
input uint KperiodLong=12;                   // %K period
input Smooth_Method DMethod=MODE_SMA;        // Signal line smoothing method 
input uint Dperiod=7;                        // %D signal line period
input int DPhase=15;                         // Signal line smoothing parameter
input uint Slowing=3;                        // Slowing
input ENUM_STO_PRICE PriceField=STO_LOWHIGH; // Prices selection parameter for calculation
input uint Sens=7;                           // Sensitivity in points
input uint OverBought=80;                    // Overbought level, %%
input uint OverSold=20;                      // Oversold level, %%
input color LevelsColor=Blue;                // Levels color
input STYLE Levelstyle=DASH_;                // Levels style
input WIDTH  LevelsWidth=Width_1;            // Levels width
input int Shift=0;                           // Horizontal shift of the indicator in bars
//+-----------------------------------+
//---- declaration of dynamic arrays that
//---- will be used as indicator buffers
double Stoch[],XStoch[];
double sens; // sensitivity in prices
//---- declaration of the integer variables for the start of data calculation
int min_rates_total,min_rates_stoch;
//+------------------------------------------------------------------+   
//| Asymmetric Stoch NR indicator initialization function            | 
//+------------------------------------------------------------------+ 
void OnInit()
  {
//---- initialization of variables of the start of data calculation
   min_rates_stoch=int(MathMax(KperiodShort,KperiodLong)+Slowing);
   min_rates_total=min_rates_stoch+XMA.GetStartBars(DMethod,Dperiod,DPhase);

//---- initialization of variables   
   sens=Sens*_Point; // sensitivity in prices

//---- lines drawing parameters  
   IndicatorSetInteger(INDICATOR_LEVELS,2);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,0,OverSold);
   IndicatorSetInteger(INDICATOR_LEVELCOLOR,0,LevelsColor);
   IndicatorSetInteger(INDICATOR_LEVELSTYLE,0,Levelstyle);
   IndicatorSetInteger(INDICATOR_LEVELWIDTH,0,LevelsWidth);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,1,OverBought);
   IndicatorSetInteger(INDICATOR_LEVELCOLOR,1,LevelsColor);
   IndicatorSetInteger(INDICATOR_LEVELSTYLE,1,Levelstyle);
   IndicatorSetInteger(INDICATOR_LEVELWIDTH,1,LevelsWidth);

//---- setting up alerts for unacceptable values of external variables
   XMA.XMALengthCheck("Dperiod",Dperiod);
   XMA.XMALengthCheck("Dperiod",Dperiod);
   XMA.XMAPhaseCheck("DPhase",DPhase,DMethod);

//---- set Stoch[] dynamic array as an indicator buffer
   SetIndexBuffer(0,Stoch,INDICATOR_DATA);
//---- moving the indicator 1 horizontally
   PlotIndexSetInteger(0,PLOT_SHIFT,Shift);
//---- performing the shift of the beginning of the indicator drawing
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total);
//---- setting the indicator values that won't be visible on a chart
   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE);
//---- indexing the elements in the buffer as timeseries
   ArraySetAsSeries(Stoch,true);

//---- set XStoch[] dynamic array as an indicator buffer
   SetIndexBuffer(1,XStoch,INDICATOR_DATA);
//---- moving the indicator 1 horizontally
   PlotIndexSetInteger(1,PLOT_SHIFT,Shift);
//---- performing the shift of the beginning of the indicator drawing
   PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,min_rates_total);
//---- setting the indicator values that won't be visible on a chart
   PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,EMPTY_VALUE);
//---- indexing the elements in the buffer as timeseries
   ArraySetAsSeries(XStoch,true);

//---- initializations of a variable for the indicator short name
   string shortname,Smooth;
   Smooth=XMA.GetString_MA_Method(DMethod);
   StringConcatenate(shortname,"Asymmetric Stochastic NR(",KperiodShort,",",KperiodLong,",",Dperiod,",",Smooth,",",Slowing,")");
//---- creating a name for displaying in a separate sub-window and in a tooltip
   IndicatorSetString(INDICATOR_SHORTNAME,shortname);

//---- determination of accuracy of displaying the indicator values
   IndicatorSetInteger(INDICATOR_DIGITS,2);
//---- initialization end
  }
//+------------------------------------------------------------------+ 
//| Asymmetric Stoch NR iteration function                           | 
//+------------------------------------------------------------------+ 
int OnCalculate(const int rates_total,    // number of bars in history at the current tick
                const int prev_calculated,// amount of history in bars at the previous tick
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---- checking the number of bars to be enough for the calculation
   if(rates_total<min_rates_total) return(RESET);

//---- declaration of integer variables
   int limit,bar,maxbar;

//---- memory static variables declaration
   static uint Kperiod0,Kperiod1;

//--- calculations of the necessary amount of data to be copied and
//---- the limit starting index for the bars recalculation loop
   if(prev_calculated>rates_total || prev_calculated<=0)// checking for the first start of the indicator calculation
     {
      limit=rates_total-1-min_rates_stoch; // starting index for calculation of all bars
      Kperiod0=KperiodShort;
      Kperiod1=KperiodShort;
     }
   else limit=rates_total-prev_calculated; // starting index for calculation of new bars 

//---- indexing elements in arrays as time series  
   ArraySetAsSeries(close,true);
   ArraySetAsSeries(high,true);
   ArraySetAsSeries(low,true);

   maxbar=rates_total-1-min_rates_stoch;

//---- main indicator calculation loop
   for(bar=limit; bar>=0 && !IsStopped(); bar--)
     {
      Stoch[bar]=Stoch(Kperiod0,Kperiod1,Slowing,PriceField,sens,bar,low,high,close);
      //----
      XStoch[bar]=XMA.XMASeries(maxbar,prev_calculated,rates_total,DMethod,DPhase,Dperiod,Stoch[bar],bar,true);

      //--- switching direction
      if(XStoch[bar+1]>OverBought)
        { // up trend
         Kperiod0=KperiodShort;
         Kperiod1=KperiodLong;
        }

      if(XStoch[bar+1]<OverSold)
        { // down trend
         Kperiod0=KperiodLong;
         Kperiod1=KperiodShort;
        }
     }
//----     
   return(rates_total);
  }
//+------------------------------------------------------------------+
//| Calculation of the Stochastic provided by noise-cancelling       |
//+------------------------------------------------------------------+    
double Stoch(int Kperiod0,int Kperiod1,int Slowing_,int PriceField_,double sens_,int Bar,
             const double &Low[],const double &High[],const double &Close[])
  {
//----
   double max,min,c,delta,diff;

   c=0.0;
   max=0.0;
   min=0.0;

   for(int j=Bar; j<Bar+Slowing_; j++)
     {
      if(PriceField_==STO_CLOSECLOSE)
        {
         max+=Close[ArrayMaximum(Close,j,Kperiod0)];
         min+=Close[ArrayMinimum(Close,j,Kperiod1)];
        }

      if(PriceField_==STO_LOWHIGH)
        {
         max+=High[ArrayMaximum(High,j,Kperiod0)];
         min+=Low[ArrayMinimum(Low,j,Kperiod1)];
        }

      c+=Close[j];
     }

//--- noise-cancelling
   sens_*=Slowing_; // setting sensitivity according to a slowing period
   delta=max-min;   // range
   diff=sens-delta; // the difference between the sensitivity limit and a range

//--- in case the difference >0 (a range value is less than the limit)
   if(diff>0)
     {
      delta=sens;   // a range = the limit
      min-=diff/2;  // new low value
     }
//--- calculation of the oscillator
   if(delta) return(100*(c-min)/delta); // Stochastic
//----
   return(-2);
  }
//+------------------------------------------------------------------+