ang_AutoCh_HL-v1_v2

//+------------------------------------------------------------------+
//|                                                                  |
//|                 Copyright © 1999-2007, MetaQuotes Software Corp. |
//|                                         http://www.metaquotes.ru |
//+------------------------------------------------------------------+
#property  copyright "ANG3110@latchess.com"
//----------------------------------
#property indicator_chart_window
//----------------------------------
extern int Hours=24;
extern color col=Red;
//------------------
double lr,lr0,lrp;
double sx,sy,sxy,sx2,aa,bb;
int p,fs;
ulong sName;
int f,f0,f1;
double dh,dl,dh_1,dl_1,dh_2,dl_2;
int ai_1,ai_2,bi_1,bi_2;
double hai,lai,dhi,dli,dhm,dlm,ha0,hap,la0,lap;
double price_p1,price_p0,price_p2,price_01,price_00,price_02;
int p1,p0,p2,fp;
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int init()
  {
   p=Hours*60/Period();
   if(fs==0)
     {
      sName=CurTime(); fs=1;
     }
//----
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int deinit()
  {
   ObjectDelete("1"+(string)sName);
   ObjectDelete("0"+(string)sName);
   ObjectDelete("2"+(string)sName);
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int start()
  {
   int i,n;
//----
   if(f==1)
     {
      p1=iBarShift(Symbol(),Period(),(datetime)ObjectGet("1"+(string)sName,OBJPROP_TIME1));
      p0=iBarShift(Symbol(),Period(),(datetime)ObjectGet("0"+(string)sName,OBJPROP_TIME1));
      p2=iBarShift(Symbol(),Period(),(datetime)ObjectGet("2"+(string)sName,OBJPROP_TIME1));
      if(fp==0 && p!=p1) {p=p1; fp=1;}
      if(fp==0 && p!=p0) {p=p0; fp=1;}
      if(fp==0 && p!=p2) {p=p2; fp=1;}
     }
//----
   sx=0; sy=0; sxy=0; sx2=0;
   for(n=0; n<=p; n++)
     {
      sx+=n; sy+=Close[n]; sxy+=n*Close[n]; sx2+=MathPow(n,2);
     }
   aa=(sx*sy-(p+1)*sxy)/(MathPow(sx,2)-(p+1)*sx2); bb=(sy-aa*sx)/(p+1);
//----
   for(i=0; i<=p; i++)
     {
      lr=bb+aa*i;
      dh=High[i]-lr; dl=Low[i]-lr;
      //----
      if(i<p/2)
        {
         if(i==0)
           {
            dh_1=0.0; dl_1=0.0; ai_1=i; bi_1=i;
           }
         if(dh>=dh_1) {dh_1=dh; ai_1=i;}
         if(dl<=dl_1) {dl_1=dl; bi_1=i;}
        }
      //----
      if(i>=p/2)
        {
         if(i==p/2)
           {
            dh_2=0.0; dl_2=0.0; ai_2=i; bi_2=i;
           }
         if(dh>=dh_2) {dh_2=dh; ai_2=i;}
         if(dl<=dl_2) {dl_2=dl; bi_2=i;}
        }
     }
   lr0=bb; lrp=bb+aa*(i+p);
//===================================================
   if(MathAbs(ai_1-ai_2)>MathAbs(bi_1-bi_2)) f=1;
   if(MathAbs(ai_1-ai_2)<MathAbs(bi_1-bi_2)) f=2;
   if(MathAbs(ai_1-ai_2)==MathAbs(bi_1-bi_2))
     {
      if(MathAbs(dh_1-dh_2)<MathAbs(dl_1-dl_2)) f=1; if(MathAbs(dh_1-dh_2)>=MathAbs(dl_1-dl_2)) f=2;
     }
//=================================================
   if(f==1)
     {
      for(n=0; n<=20; n++)
        {
         f1=0;
         for(i=0; i<=p; i++)
           {
            hai=High[ai_1]*(i-ai_2)/(ai_1-ai_2)+High[ai_2]*(i-ai_1)/(ai_2-ai_1);
            if(i==0 || i==p/2) dhm=0.0;
            if(High[i]-hai>dhm && i<p/2) {ai_1=i; f1=1;}
            if(High[i]-hai>dhm && i>=p/2) {ai_2=i; f1=1;}
           }
         if(f==0) break;
        }
      //----------------------------
      for(i=0; i<=p; i++)
        {
         hai=High[ai_1]*(i-ai_2)/(ai_1-ai_2)+High[ai_2]*(i-ai_1)/(ai_2-ai_1);
         dli=Low[i]-hai;
         if(i==0) dlm=0.0; if(dli<dlm) dlm=dli;
        }
      ha0=High[ai_1]*(0-ai_2)/(ai_1-ai_2)+High[ai_2]*(0-ai_1)/(ai_2-ai_1);
      hap=High[ai_1]*(p-ai_2)/(ai_1-ai_2)+High[ai_2]*(p-ai_1)/(ai_2-ai_1);
      //----------------------------
      price_p1=hap;
      price_p0=hap+dlm/2;
      price_p2=hap+dlm;
      price_01=ha0;
      price_00=ha0+dlm/2;
      price_02=ha0+dlm;
     }
//=================================================
   if(f==2)
     {
      for(n=0; n<=20; n++)
        {
         f1=0;
         for(i=0; i<=p; i++) 
           {
            lai=Low[bi_1]*(i-bi_2)/(bi_1-bi_2)+Low[bi_2]*(i-bi_1)/(bi_2-bi_1);
            if(i==0 || i==p/2) dlm=0.0;
            if(Low[i]-lai<dlm && i<p/2) {bi_1=i; f1=1;}
            if(Low[i]-lai<dlm && i>=p/2) {bi_2=i; f1=1;}
           }
         if(f==0) break;
        }
      //----------------------------
      for(i=0; i<=p; i++)
        {
         lai=Low[bi_1]*(i-bi_2)/(bi_1-bi_2)+Low[bi_2]*(i-bi_1)/(bi_2-bi_1);
         dhi=High[i]-lai;
         if(i==0) dhm=0.0; if(dhi>dhm) dhm=dhi;
        }
      la0=Low[bi_1]*(0-bi_2)/(bi_1-bi_2)+Low[bi_2]*(0-bi_1)/(bi_2-bi_1);
      lap=Low[bi_1]*(p-bi_2)/(bi_1-bi_2)+Low[bi_2]*(p-bi_1)/(bi_2-bi_1);
      //----------------------------------------------------------------
      price_p1=lap;
      price_p0=lap+dhm/2;
      price_p2=lap+dhm;
      price_01=la0;
      price_00=la0+dhm/2;
      price_02=la0+dhm;
     }
//===================================================================================
   ObjectCreate("1"+(string)sName,2,0,Time[p],price_p1,Time[0],price_01);
   ObjectCreate("0"+(string)sName,2,0,Time[p],price_p0,Time[0],price_00);
   ObjectCreate("2"+(string)sName,2,0,Time[p],price_p2,Time[0],price_02);
//-----------------------------------------------------------------
   ObjectSet("1"+(string)sName,OBJPROP_COLOR,col);
   ObjectSet("0"+(string)sName,OBJPROP_COLOR,col);
   ObjectSet("0"+(string)sName,OBJPROP_STYLE,STYLE_DOT);
   ObjectSet("2"+(string)sName,OBJPROP_COLOR,col);
//---------------------------------------------
   ObjectSet("1"+(string)sName,OBJPROP_TIME1,Time[p]);
   ObjectSet("1"+(string)sName,OBJPROP_PRICE1,price_p1);
   ObjectSet("1"+(string)sName,OBJPROP_TIME2,Time[0]);
   ObjectSet("1"+(string)sName,OBJPROP_PRICE2,price_01);
   ObjectSet("0"+(string)sName,OBJPROP_TIME1,Time[p]);
   ObjectSet("0"+(string)sName,OBJPROP_PRICE1,price_p0);
   ObjectSet("0"+(string)sName,OBJPROP_TIME2,Time[0]);
   ObjectSet("0"+(string)sName,OBJPROP_PRICE2,price_00);
   ObjectSet("2"+(string)sName,OBJPROP_TIME1,Time[p]);
   ObjectSet("2"+(string)sName,OBJPROP_PRICE1,price_p2);
   ObjectSet("2"+(string)sName,OBJPROP_TIME2,Time[0]);
   ObjectSet("2"+(string)sName,OBJPROP_PRICE2,price_02);
   f=1; p1=p; p0=p; p2=p; fp=0;
//*************************************************************************************
   return(0);
  }
//+------------------------------------------------------------------+