//+------------------------------------------------------------------+
//|                                                  Four_MA_Ind.mq4 |
//|                                    Copyright © 2006, Robert Hill |
//| Written by Robert Hill with addition of LSMA MA_Mode 4           |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2006, Robert Hill)"

#property indicator_chart_window
#property  indicator_buffers 4
#property  indicator_color1  Red
#property  indicator_color2  Green
#property  indicator_color3  Yellow
#property  indicator_color4  Aqua
#property  indicator_width1  1
#property  indicator_width2  1
#property  indicator_width3  1
#property  indicator_width4  1


extern int MA_Period1 =   5;
extern int MA_Mode1 = 1; //0=sma, 1=ema, 2=smma, 3=lwma, 4=lsma
extern int PriceMode1 = 0;//0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2, 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4

extern int MA_Period2 =   10;
extern int MA_Mode2 = 1; //0=sma, 1=ema, 2=smma, 3=lwma, 4=lsma
extern int PriceMode2 = 0;//0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2, 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4

extern int MA_Period3 =   20;
extern int MA_Mode3 = 1; //0=sma, 1=ema, 2=smma, 3=lwma, 4=lsma
extern int PriceMode3 = 0;//0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2, 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4

extern int MA_Period4 =   30;
extern int MA_Mode4 = 1; //0=sma, 1=ema, 2=smma, 3=lwma, 4=lsma
extern int PriceMode4 = 0;//0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2, 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4
double MA1[];
double MA2[];
double MA3[];
double MA4[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- drawing settings
   SetIndexStyle(0,DRAW_LINE);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexStyle(2,DRAW_LINE);
   SetIndexStyle(3,DRAW_LINE);
   SetIndexDrawBegin(0,MA_Period4);
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+2);

//---- 3 indicator buffers mapping
   if(!SetIndexBuffer(0,MA1) &&
      !SetIndexBuffer(1,MA2) &&
      !SetIndexBuffer(2,MA3) &&
      !SetIndexBuffer(3,MA4))
      Print("cannot set indicator buffers!");
//---- initialization done

//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 

//----
   return(0);
  }

//+------------------------------------------------------------------+
//| LSMA with PriceMode                                              |
//| PrMode  0=close, 1=open, 2=high, 3=low, 4=median(high+low)/2,    |
//| 5=typical(high+low+close)/3, 6=weighted(high+low+close+close)/4  |
//+------------------------------------------------------------------+

double LSMA(int Rperiod, int prMode, int shift)
{
   int i;
   double sum, pr;
   int length;
   double lengthvar;
   double tmp;
   double wt;

   length = Rperiod;
 
   sum = 0;
   for(i = length; i >= 1  ; i--)
   {
     lengthvar = length + 1;
     lengthvar /= 3;
     tmp = 0;
     switch (prMode)
     {
     case 0: pr = Close[length-i+shift];break;
     case 1: pr = Open[length-i+shift];break;
     case 2: pr = High[length-i+shift];break;
     case 3: pr = Low[length-i+shift];break;
     case 4: pr = (High[length-i+shift] + Low[length-i+shift])/2;break;
     case 5: pr = (High[length-i+shift] + Low[length-i+shift] + Close[length-i+shift])/3;break;
     case 6: pr = (High[length-i+shift] + Low[length-i+shift] + Close[length-i+shift] + Close[length-i+shift])/4;break;
     }
     tmp = ( i - lengthvar)*pr;
     sum+=tmp;
    }
    wt = sum*6/(length*(length+1));
    
    return(wt);
}


//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start() {
   int limit, i;
   int counted_bars=IndicatorCounted();
//---- check for possible errors
   if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;

   limit=Bars-counted_bars;
   
   for(i = 0; i <= limit; i++) {
      if (MA_Mode1 == 4)
      {
         MA1[i] = LSMA(MA_Period1, PriceMode1, i);
         
      }
      else
      {
         MA1[i] = iMA(NULL, 0, MA_Period1, 0, MA_Mode1, PriceMode1, i);
      }

      if (MA_Mode2 == 4)
      {
         MA2[i] = LSMA(MA_Period2, PriceMode2, i);
         
      }
      else
      {
         MA2[i] = iMA(NULL, 0, MA_Period2, 0, MA_Mode2, PriceMode2, i);
      }
      if (MA_Mode3 == 4)
      {
         MA3[i] = LSMA(MA_Period3, PriceMode3, i);
         
      }
      else
      {
         MA3[i] = iMA(NULL, 0, MA_Period3, 0, MA_Mode3, PriceMode3, i);
      }
      if (MA_Mode4 == 4)
      {
         MA4[i] = LSMA(MA_Period4, PriceMode4, i);
         
      }
      else
      {
         MA4[i] = iMA(NULL, 0, MA_Period4, 0, MA_Mode4, PriceMode4, i);
      }
      
   }

   return(0);
}