int MaPeriod = 1; // MA Period
int MaShift = 0; // MA Shift
ENUM_MA_METHOD MaMethod = MODE_SMA; // MA Method
ENUM_APPLIED_PRICE MaPrice = PRICE_OPEN; // MA Close Price
int OpenBar = 0; // MA Open Bar Shift
int HighBar = 0; // MA High Bar Shift
int LowBar = 0; // MA Low Bar Shift
int CloseBar = 0; // MA Close Bar Shift

void OnTick()
{
 if((iHAMA(0)==0 && iHAMA(1)==1) || (iHAMA(0)==1 && iHAMA(1)==0) )
  {
   //close all
  }

 if(iHAMA(0)==1)
  {
   //sell
  }
 else
  {
   if(iHAMA(0)==0)
    {
     //buy
    }        
  } 
}

int iHAMA(int bar)
{
 double maOpen,maHigh,maLow,maClose,haOpen,haClose;
 double ExtMapBuffer1[30];
 double ExtMapBuffer2[30];
 ArrayFill(ExtMapBuffer1,0,30,0);
 ArrayFill(ExtMapBuffer2,0,30,0);
 for(int iCntr=15; iCntr>=0; iCntr--)
  {
   maOpen=iMA(NULL,0,MaPeriod,0,MaMethod,PRICE_OPEN,iCntr+OpenBar);
   maHigh=iMA(NULL,0,MaPeriod,0,MaMethod,PRICE_HIGH,iCntr+HighBar);
   maLow=iMA(NULL,0,MaPeriod,0,MaMethod,PRICE_LOW,iCntr+LowBar);
   maClose=iMA(NULL,0,MaPeriod,0,MaMethod,MaPrice,iCntr+CloseBar);
   haOpen=(ExtMapBuffer1[iCntr+1]+ExtMapBuffer2[iCntr+1])/2;
   haClose=(maOpen+maHigh+maLow+maClose)/4;
   ExtMapBuffer1[iCntr]=haOpen;
   ExtMapBuffer2[iCntr]=haClose;
  }
 if(ExtMapBuffer1[bar]>ExtMapBuffer2[bar]){return(OP_SELL);}
 if(ExtMapBuffer2[bar]>ExtMapBuffer1[bar]){return(OP_BUY);}
 return(-1);
}