//+------------------------------------------------------------------+
//|                                                       iTrend.mq4 |
//|                      Copyright © 2004, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red
//---- input parameters
extern int Bands_Mode_0_2 = 0;  // =0-2 MODE_MAIN, MODE_LOW, MODE_HIGH
extern int Power_Price_0_6 = 0; // =0-6 PRICE_CLOSE,PRICE_OPEN,PRICE_HIGH,PRICE_LOW,PRICE_MEDIAN,PRICE_TYPICAL,PRICE_WEIGHTED
extern int Price_Type_0_3 = 0;  // =0-3 PRICE_CLOSE,PRICE_OPEN,PRICE_HIGH,PRICE_LOW
extern int Bands_Period = 20;
extern int Bands_Deviation = 2;
extern int Power_Period = 13;
extern int CountBars = 300;
//---- buffers
double value[];
double value2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//   string short_name;
//---- indicator line
   IndicatorBuffers(2);
   SetIndexStyle(0, DRAW_HISTOGRAM);
   SetIndexStyle(1, DRAW_HISTOGRAM);
   SetIndexBuffer(0, value);
   SetIndexBuffer(1, value2);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("iTrend (" + Bands_Period + ", " + Bands_Deviation + ")");
   SetIndexLabel(0, "iTrend1 (" + Bands_Period + ", " + Bands_Deviation + ")");
   SetIndexLabel(1, "iTrend2 (" + Bands_Period + ", " + Bands_Deviation + ")");      
//----
   SetIndexDrawBegin(0, Bars - CountBars + Bands_Period + 1);
   SetIndexDrawBegin(1, Bars - CountBars + Bands_Period + 1);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Trend                                                         |
//+------------------------------------------------------------------+
int start()
  {
   int i, CurrentBar, Bands_Mode, counted_bars = IndicatorCounted();
   double Power_Price, CurrentPrice;
//----
   if(Bars <= Bands_Period) 
       return(0);
//---- initial zero
   if(counted_bars < Bands_Period)
     {
       for(i = 1; i <= Bands_Period; i++) 
           value[Bars-i] = 0.0;
       for(i = 1; i <= Bands_Period; i++) 
           value2[Bars-i] = 0.0;
     }
//----
   i = CountBars - Bands_Period - 1;
//   if(counted_bars>=Bands_Period) i=Bars-counted_bars-1;
   if(Bands_Mode_0_2 == 1) 
       Bands_Mode = MODE_LOW;
   if(Bands_Mode_0_2 == 2) 
       Bands_Mode = MODE_HIGH;
   if(Bands_Mode_0_2 == 0) 
       Bands_Mode = MODE_MAIN;

   if(Power_Price_0_6 == 1) 
       Power_Price = PRICE_OPEN;
   if(Power_Price_0_6 == 2) 
       Power_Price = PRICE_HIGH;
   if(Power_Price_0_6 == 3) 
       Power_Price = PRICE_LOW;
   if(Power_Price_0_6 == 4) 
       Power_Price = PRICE_MEDIAN;
   if(Power_Price_0_6 == 5) 
       Power_Price = PRICE_TYPICAL;
   if(Power_Price_0_6 == 6) 
       Power_Price = PRICE_WEIGHTED;
   if(Power_Price_0_6 == 6) 
       Power_Price = PRICE_CLOSE;

   for(i = CountBars - 1; i >= 0; i--)
     {  
       if(Price_Type_0_3 == 1) 
           CurrentPrice = Open[i];
  
       if(Price_Type_0_3 == 2) 
           CurrentPrice = High[i];

       if(Price_Type_0_3 == 3) 
           CurrentPrice = Low[i];
       if(Price_Type_0_3 == 0) 
           CurrentPrice = Close[i]; 
     
       value[i] = CurrentPrice - iBands(NULL, 0, Bands_Period, Bands_Deviation, 
                                        0, Bands_Mode, Power_Price, i);
       value2[i] = -(iBearsPower(NULL, 0, Power_Period, Power_Price, i) + 
                     iBullsPower(NULL, 0, Power_Period, Power_Price, i)); 
     }  
   return(0);
  }
//+------------------------------------------------------------------+