Custom_Pattern

ÿþ//+------------------------------------------------------------------+

//|                                               Custom_Pattern.mq5 |

//|                        Copyright 2018, MetaQuotes Software Corp. |

//|                                                 https://mql5.com |

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

#property copyright "Copyright 2018, MetaQuotes Software Corp."

#property link      "https://mql5.com"

#property version   "1.00"

#property indicator_chart_window

#property indicator_buffers 2

#property indicator_plots   2

#property description   "The indicator provides the user to"

#property description   "specify a custom format pattern candle"

#property description   "and draws patterns on the chart"

#property description   "------------------------------------"

#property description   "U - UP candle (Close>Open)"

#property description   "D - DOWN candle (Close<Open)"

#property description   "N - Nothing (UP or DOWN)"



//--- plot DIR

#property indicator_label1  "DIR"

#property indicator_type1   DRAW_ARROW

#property indicator_color1  clrBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot REV

#property indicator_label2  "REV"

#property indicator_type2   DRAW_ARROW

#property indicator_color2  clrRed

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- enums

enum ENUM_INPUT_YES_NO

  {

   INPUT_YES   =  1, // Yes

   INPUT_NO    =  0  // No

  };

//--- input parameters

input string            InpPattern     =  "UND";      // Pattern (U - up, N - nothing, D - down)

input ENUM_INPUT_YES_NO InpShowReverce =  INPUT_NO;   // Show reverse pattern

//--- indicator buffers

double         BufferDIR[];

double         BufferREV[];

//--- global variables

uchar          array[];

int            length;

string         pattern;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- set global variables

   pattern=InpPattern;

   StringTrimLeft(pattern);

   StringTrimRight(pattern);

   if(!StringToLower(pattern))

     {

      Print("Failed to convert characters of string '",pattern,"' to lowercase. Error: ",GetLastError());

      return INIT_FAILED;

     }

   length=StringLen(pattern);

   ResetLastError();

   if(ArrayResize(array,length)==length)

      StringToCharArray(pattern,array);

   else

     {

      Print("Error filling the array of characters: ",GetLastError());

      return INIT_FAILED;

     }

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferDIR,INDICATOR_DATA);

   SetIndexBuffer(1,BufferREV,INDICATOR_DATA);

//--- setting a code from the Wingdings charset as the property of PLOT_ARROW

   PlotIndexSetInteger(0,PLOT_ARROW,119);

   PlotIndexSetInteger(1,PLOT_ARROW,119);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"Custom pattern");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferDIR,true);

   ArraySetAsSeries(BufferREV,true);

   ArraySetAsSeries(array,false);

//---

   return(INIT_SUCCEEDED);

  }

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

//| Custom indicator iteration function                              |

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

int OnCalculate(const int rates_total,

                const int prev_calculated,

                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[])

  {

//--- @>25@:0 =0 <8=8<0;L=>5 :>;85AB2> 10@>2 4;O @0AGQB0

   if(rates_total<length+1) return 0;

//--- #AB0=>2:0 <0AA82>2 1CD5@>2 :0: B09<A5@89

   ArraySetAsSeries(open,true);

   ArraySetAsSeries(high,true);

   ArraySetAsSeries(low,true);

   ArraySetAsSeries(close,true);

//--- @>25@:0 8 @0AGQB :>;8G5AB20 ?@>AG8BK205<KE 10@>2

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-length-1;

      ArrayInitialize(BufferDIR,EMPTY_VALUE);

      ArrayInitialize(BufferREV,EMPTY_VALUE);

     }

//---  0AGQB 8=48:0B>@0

   for(int i=limit; i>=0 && !IsStopped(); i--)

     {

      if(DirectPattern(i,open,close))

         BufferDIR[i]=high[i];

      if(InpShowReverce && ReversePattern(i,open,close))

         BufferREV[i]=low[i];

     }

//--- return value of prev_calculated for next call

   return(rates_total);

  }

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

//|                                                                  |

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

bool DirectPattern(const int shift,const double &open[],const double &close[])

  {

   string s="";

   //string Pat=StringTrimLeft(StringTrimRight(Pattern));

   bool f=true;

   for(int i=1; i<=length; i++)

     {

      s=CharToString(array[length-i]);//StringSubstr(Pat,LengthPattern-i,1);

      if((s=="u") && (close[shift+i-1]<=open[shift+i-1])) f=false;

      if((s=="d") && (close[shift+i-1]>=open[shift+i-1])) f=false;

     }

   return f;

  }

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

//|                                                                  |

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

bool ReversePattern(const int shift,const double &open[],const double &close[])

  {

   string s="";

   //string Pat=StringTrimLeft(StringTrimRight(Pattern));

   bool f=true;

   for(int i=1; i<=length; i++)

     {

      s=CharToString(array[length-i]);//StringSubstr(Pat,LengthPattern-i,1);

      if((s=="u") && (close[shift+i-1]>=open[shift+i-1])) f=false;

      if((s=="d") && (close[shift+i-1]<=open[shift+i-1])) f=false;

     }

   return f;

  }

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