price_channel_central

//+------------------------------------------------------------------+
//|                                        Price Channel Central.mq4 |
//|                                               Yuriy Tokman (YTG) |
//|                                               http://ytg.com.ua/ |
//+------------------------------------------------------------------+
#property copyright "Yuriy Tokman (YTG)"
#property link      "http://ytg.com.ua/"
#property version   "1.00"
#property strict
#property indicator_chart_window

#property indicator_buffers 3 
#property indicator_color1 Red 
#property indicator_color2 Green
#property indicator_color3 Blue
#property indicator_width1 2
#property indicator_width2 2
//----
extern int Bars_Count=32;
//---- buffers 
double B0[];
double B1[];
double B2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   int shift_begin=Bars_Count;
   IndicatorShortName("Price Channel Central ("+DoubleToStr(Bars_Count,0)+")");
   SetIndexBuffer(0,B0);
   SetIndexBuffer(1,B1);
   SetIndexBuffer(2,B2);
   SetIndexStyle(0,DRAW_LINE);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexStyle(2,DRAW_LINE);
   SetIndexDrawBegin(0,shift_begin);
   SetIndexDrawBegin(1,shift_begin);
   SetIndexDrawBegin(2,shift_begin);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   ArrowRightPriceDelete(0,"RightPrice1");
   ArrowRightPriceDelete(0,"RightPrice2");
   ArrowRightPriceDelete(0,"RightPrice3");
   ArrowRightPriceDelete(0,"Label");
  }
//+------------------------------------------------------------------+
//| 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[])
  {
//---
   int limit=rates_total-prev_calculated;
   if(prev_calculated==0)limit--;
   else  limit++;
   double hi=0,lo=0,ce=0;
   for(int i=0; i<limit && !IsStopped(); i++)
     {
      hi = High[iHighest(Symbol(),0,MODE_HIGH,Bars_Count,i+1)];
      lo = Low[iLowest(Symbol(),0,MODE_LOW,Bars_Count,i+1)];
      ce = (hi+lo)/2;
      B0[i]=hi;
      B1[i]=lo;
      B2[i]=ce;
     }
   color colir=clrBlue; string sig="NONE";
   if(Bid>B2[0]){colir=clrGreen; sig = "BUY";}
   if(Ask<B2[0]){colir=clrRed; sig = "SELL";}
//---
   LabelCreate(sig+" SIGNALS",colir);
//---
   ArrowRightPriceCreate(0,"RightPrice1",0,Time[0],B0[0],clrRed,STYLE_SOLID,2);
   ArrowRightPriceCreate(0,"RightPrice2",0,Time[0],B1[0],clrGreen,STYLE_SOLID,2);
   ArrowRightPriceCreate(0,"RightPrice3",0,Time[0],B2[0],clrBlue,STYLE_SOLID,2);
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+
//| Ñîçäàåò ïðàâóþ öåíîâóþ ìåòêó                                     |
//+------------------------------------------------------------------+
bool ArrowRightPriceCreate(long            chart_ID=0,        // ID ãðàôèêà
                           string          name="RightPrice", // èìÿ öåíîâîé ìåòêè
                           int             sub_window=0,      // íîìåð ïîäîêíà
                           datetime        time=0,            // âðåìÿ òî÷êè ïðèâÿçêè
                           double          price=0,           // öåíà òî÷êè ïðèâÿçêè
                           color           clr=clrRed,        // öâåò öåíîâîé ìåòêè
                           ENUM_LINE_STYLE style=STYLE_SOLID, // ñòèëü îêàéìëÿþùåé ëèíèè
                           int             width=1)           // ðàçìåð öåíîâîé ìåòêè
  {
   ArrowRightPriceDelete(chart_ID,name);
//--- ñáðîñèì çíà÷åíèå îøèáêè
   ResetLastError();
//--- ñîçäàäèì öåíîâóþ ìåòêó
   if(!ObjectCreate(chart_ID,name,OBJ_ARROW_RIGHT_PRICE,sub_window,time,price))
     {
      Print(__FUNCTION__,
            ": íå óäàëîñü ñîçäàòü ïðàâóþ öåíîâóþ ìåòêó! Êîä îøèáêè = ",GetLastError());
      return(false);
     }
//--- óñòàíîâèì öâåò ìåòêè
   ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);
//--- óñòàíîâèì ñòèëü îêàéìëÿþùåé ëèíèè
   ObjectSetInteger(chart_ID,name,OBJPROP_STYLE,style);
//--- óñòàíîâèì ðàçìåð ìåòêè
   ObjectSetInteger(chart_ID,name,OBJPROP_WIDTH,width);
//--- óñïåøíîå âûïîëíåíèå
   return(true);
  }
//+------------------------------------------------------------------+
//| Óäàëÿåò ïðàâóþ öåíîâóþ ìåòêó ñ ãðàôèêà                           |
//+------------------------------------------------------------------+
bool ArrowRightPriceDelete(long   chart_ID=0,        // ID ãðàôèêà
                           string name="RightPrice") // èìÿ ìåòêè
  {
   if(ObjectFind(chart_ID,name)<0)return(false);
//--- ñáðîñèì çíà÷åíèå îøèáêè
   ResetLastError();
//--- óäàëèì ìåòêó
   if(!ObjectDelete(chart_ID,name))
     {
      Print(__FUNCTION__,
            ": íå óäàëîñü óäàëèòü ïðàâóþ öåíîâóþ ìåòêó! Êîä îøèáêè = ",GetLastError());
      return(false);
     }
//--- óñïåøíîå âûïîëíåíèå
   return(true);
  }
//+------------------------------------------------------------------+
//| Ñîçäàåò òåêñòîâóþ ìåòêó                                          |
//+------------------------------------------------------------------+
bool LabelCreate(string            text="Label",              // òåêñò
                 color             clr=clrRed,                // öâåò
                 long              chart_ID=0,                // ID ãðàôèêà
                 string            name="Label",              // èìÿ ìåòêè
                 int               sub_window=0,              // íîìåð ïîäîêíà
                 int               x=10,                      // êîîðäèíàòà ïî îñè X
                 int               y=10,                      // êîîðäèíàòà ïî îñè Y
                 ENUM_BASE_CORNER  corner=CORNER_RIGHT_UPPER, // óãîë ãðàôèêà äëÿ ïðèâÿçêè
                 ENUM_ANCHOR_POINT anchor=ANCHOR_RIGHT_UPPER, // ñïîñîá ïðèâÿçêè
                 string            font="Arial",              // øðèôò
                 int               font_size=10)              // ðàçìåð øðèôòà                                  
  {
   ArrowRightPriceDelete(chart_ID,name);
//--- ñáðîñèì çíà÷åíèå îøèáêè
   ResetLastError();
//--- ñîçäàäèì òåêñòîâóþ ìåòêó
   if(!ObjectCreate(chart_ID,name,OBJ_LABEL,sub_window,0,0))
     {
      Print(__FUNCTION__,
            ": íå óäàëîñü ñîçäàòü òåêñòîâóþ ìåòêó! Êîä îøèáêè = ",GetLastError());
      return(false);
     }
//--- óñòàíîâèì êîîðäèíàòû ìåòêè
   ObjectSetInteger(chart_ID,name,OBJPROP_XDISTANCE,x);
   ObjectSetInteger(chart_ID,name,OBJPROP_YDISTANCE,y);
//--- óñòàíîâèì óãîë ãðàôèêà, îòíîñèòåëüíî êîòîðîãî áóäóò îïðåäåëÿòüñÿ êîîðäèíàòû òî÷êè
   ObjectSetInteger(chart_ID,name,OBJPROP_CORNER,corner);
//--- óñòàíîâèì òåêñò
   ObjectSetString(chart_ID,name,OBJPROP_TEXT,text);
//--- óñòàíîâèì øðèôò òåêñòà
   ObjectSetString(chart_ID,name,OBJPROP_FONT,font);
//--- óñòàíîâèì ðàçìåð øðèôòà
   ObjectSetInteger(chart_ID,name,OBJPROP_FONTSIZE,font_size);
//--- óñòàíîâèì ñïîñîá ïðèâÿçêè
   ObjectSetInteger(chart_ID,name,OBJPROP_ANCHOR,anchor);
//--- óñòàíîâèì öâåò
   ObjectSetInteger(chart_ID,name,OBJPROP_COLOR,clr);
//--- óñïåøíîå âûïîëíåíèå
   return(true);
  }
//+------------------------------------------------------------------+