4kk4.MQL5/Indicators/Support_and_Resistance.mq5

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+
//|                                       Support_and_Resistance.mq5 |
//|                                       Copyright <EFBFBD> 2005,  <8B@89 |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright <00> 2006, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"
//---- =><5@ 25@A88 8=48:0B>@0
#property version   "1.12"
//---- >B@8A>2:0 8=48:0B>@0 2 3;02=>< >:=5
#property indicator_chart_window 
//---- 4;O @0AG5B0 8 >B@8A>2:8 8=48:0B>@0 8A?>;L7>20=> 420 1CD5@0
#property indicator_buffers 2
//---- 8A?>;L7>20=> 2A53> 420 3@0D8G5A:8E ?>AB@>5=8O
#property indicator_plots   2
//+----------------------------------------------+
//|  >1JO2;5=85 :>=AB0=B                         |
//+----------------------------------------------+
#define RESET 0                     // >=AB0=B0 4;O 2>72@0B0 B5@<8=0;C :><0=4K =0 ?5@5AG5B 8=48:0B>@0
//+----------------------------------------------+
//|  0@0<5B@K >B@8A>2:8 <54256L53> 8=48:0B>@0   |
//+----------------------------------------------+
//---- >B@8A>2:0 8=48:0B>@0 1 2 2845 A8<2>;0
#property indicator_type1   DRAW_ARROW
//---- 2 :0G5AB25 F25B0 C@>2=59 ?>445@6:8 8A?>;L7>20= @>7>2K9 F25B
#property indicator_color1  clrMagenta
//---- B>;I8=0 ;8=88 8=48:0B>@0 1 @02=0 1
#property indicator_width1  1
//---- >B>1@065=85 <5B:8 ?>445@6:8
#property indicator_label1  "Support"
//+----------------------------------------------+
//|  0@0<5B@K >B@8A>2:8 1KGL3> 8=48:0B>@0       |
//+----------------------------------------------+
//---- >B@8A>2:0 8=48:0B>@0 2 2 2845 A8<2>;0
#property indicator_type2   DRAW_ARROW
//---- 2 :0G5AB25 F25B0 C@>2=59 A>?@>B82;5=8O 8A?>;L7>20= 75;5=K9 F25B
#property indicator_color2  clrLime
//---- B>;I8=0 ;8=88 8=48:0B>@0 2 @02=0 1
#property indicator_width2  1
//---- >B>1@065=85 <5B:8 A>?@>B82;5=8O
#property indicator_label2 "Resistance"

//+----------------------------------------------+
//| E>4=K5 ?0@0<5B@K 8=48:0B>@0                 |
//+----------------------------------------------+

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

//---- >1JO2;5=85 48=0<8G5A:8E <0AA82>2, :>B>@K5 1C4CB 2 
// 40;L=59H5< 8A?>;L7>20=K 2 :0G5AB25 8=48:0B>@=KE 1CD5@>2
double SellBuffer[];
double BuyBuffer[];
//---
int StartBars;
int FRA_Handle;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//---- 8=8F80;870F8O 3;>10;L=KE ?5@5<5==KE 
   StartBars=6;
//---- ?>;CG5=85 E5=4;0 8=48:0B>@0 iFractals
   FRA_Handle=iFractals(NULL,0);
   if(FRA_Handle==INVALID_HANDLE)
     {
      Print(" 5 C40;>AL ?>;CG8BL E5=4; 8=48:0B>@0 iFractals");
     return(INIT_FAILED);
     }

//---- ?@52@0I5=85 48=0<8G5A:>3> <0AA820 2 8=48:0B>@=K9 1CD5@
   SetIndexBuffer(0,SellBuffer,INDICATOR_DATA);
//---- >ACI5AB2;5=85 A42830 =0G0;0 >BAG5B0 >B@8A>2:8 8=48:0B>@0 1
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,StartBars);
//--- A>740=85 <5B:8 4;O >B>1@065=8O 2 DataWindow
   PlotIndexSetString(0,PLOT_LABEL,"Support");
//---- A8<2>; 4;O 8=48:0B>@0
   PlotIndexSetInteger(0,PLOT_ARROW,159);
//---- 8=45:A0F8O M;5<5=B>2 2 1CD5@5 :0: 2 B09<A5@88
   ArraySetAsSeries(SellBuffer,true);

//---- ?@52@0I5=85 48=0<8G5A:>3> <0AA820 2 8=48:0B>@=K9 1CD5@
   SetIndexBuffer(1,BuyBuffer,INDICATOR_DATA);
//---- >ACI5AB2;5=85 A42830 =0G0;0 >BAG5B0 >B@8A>2:8 8=48:0B>@0 2
   PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,StartBars);
//--- A>740=85 <5B:8 4;O >B>1@065=8O 2 DataWindow
   PlotIndexSetString(1,PLOT_LABEL,"Resistance");
//---- A8<2>; 4;O 8=48:0B>@0
   PlotIndexSetInteger(1,PLOT_ARROW,159);
//---- 8=45:A0F8O M;5<5=B>2 2 1CD5@5 :0: 2 B09<A5@88
   ArraySetAsSeries(BuyBuffer,true);

//---- #AB0=>2:0 D>@<0B0 B>G=>AB8 >B>1@065=8O 8=48:0B>@0
   IndicatorSetInteger(INDICATOR_DIGITS,_Digits);
//---- 8<O 4;O >:>= 40==KE 8 ;M910 4;O AC1J>:>= 
   string short_name="Support & Resistance";
   IndicatorSetString(INDICATOR_SHORTNAME,short_name);
//--- 7025@H5=85 8=8F80;870F88
   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 :>;8G5AB20 10@>2 =0 4>AB0B>G=>ABL 4;O @0AG5B0
   if(BarsCalculated(FRA_Handle)<rates_total || rates_total<StartBars) return(RESET);

//---- >1JO2;5=8O ;>:0;L=KE ?5@5<5==KE 
   int to_copy,limit,bar;
   double FRAUp[],FRALo[],upVel,loVel;

//---- @0AG5BK =5>1E>48<>3> :>;8G5AB20 :>?8@C5<KE 40==KE
//---- 8 AB0@B>2>3> =><5@0 limit 4;O F8:;0 ?5@5AG5B0 10@>2
   if(prev_calculated>rates_total || prev_calculated<=0)// ?@>25@:0 =0 ?5@2K9 AB0@B @0AG5B0 8=48:0B>@0
     {
      to_copy=rates_total; // @0AG5B=>5 :>;8G5AB2> 2A5E 10@>2
      limit=rates_total-StartBars-1; // AB0@B>2K9 =><5@ 4;O @0AG5B0 2A5E 10@>2
     }
   else
     {
      to_copy=rates_total-prev_calculated+3; // @0AG5B=>5 :>;8G5AB2> B>;L:> =>2KE 10@>2
      limit=rates_total-prev_calculated+2; // AB0@B>2K9 =><5@ 4;O @0AG5B0 =>2KE 10@>2
     }

//---- 8=45:A0F8O M;5<5=B>2 2 <0AA820E :0: 2 B09<A5@8OE  
   ArraySetAsSeries(FRAUp,true);
   ArraySetAsSeries(FRALo,true);
   ArraySetAsSeries(high,true);
   ArraySetAsSeries(low,true);

//---- :>?8@C5< 2=>2L ?>O282H85AO 40==K5 2 <0AA82K
   if(CopyBuffer(FRA_Handle,0,0,to_copy,FRAUp)<=0) return(RESET);
   if(CopyBuffer(FRA_Handle,1,0,to_copy,FRALo)<=0) return(RESET);

//---- >A=>2=>9 F8:; @0AG5B0 8=48:0B>@0
   for(bar=limit; bar>=0; bar--)
     {
       BuyBuffer[bar]=NULL;
       SellBuffer[bar]=NULL; 
       //----
       upVel=FRAUp[bar];
       loVel=FRALo[bar];
       //----
       if(upVel && upVel!=EMPTY_VALUE) BuyBuffer[bar]=high[bar]; else BuyBuffer[bar]=BuyBuffer[bar+1];
       if(loVel && loVel!=EMPTY_VALUE) SellBuffer[bar]=low[bar]; else SellBuffer[bar]=SellBuffer[bar+1];
     }
//----     
   return(rates_total);
  }
//+------------------------------------------------------------------+