//+------------------------------------------------------------------+
//|                                                  TrendFollow.mq4 |
//|                                             Copyright 2017, AM2. |
//|                                      http://www.forexsyatems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, AM2."
#property link      "http://www.forexsyatems.biz"
#property version   "1.00"
#property strict
#property indicator_chart_window
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping

//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void PutTrendLine(string name,datetime time1,double price1,datetime time2,double price2,color clr)
  {
   ObjectDelete(0,name);
   ObjectCreate(0,name,OBJ_TREND,0,time1,price1,time2,price2);
//--- установим цвет линии 
   ObjectSetInteger(0,name,OBJPROP_COLOR,clr);
//--- установим стиль отображения линии 
   ObjectSetInteger(0,name,OBJPROP_STYLE,STYLE_SOLID);
//--- установим толщину линии 
   ObjectSetInteger(0,name,OBJPROP_WIDTH,2);
//--- включим (true) или отключим (false) режим продолжения отображения линии вправо 
   ObjectSetInteger(0,name,OBJPROP_RAY_RIGHT,false);
  }
//+------------------------------------------------------------------+
//| 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[])
  {
//---
   if(Low[1]>Low[33]) PutTrendLine("UP",Time[33],Low[33],Time[1],Low[1],Blue);
   if(High[1]<High[33]) PutTrendLine("DN",Time[33],High[33],Time[1],High[1],Red);
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+