Array Out Of Range - Trying to move small indicator into EA

Here is the indicator code I'm trying to move inside an EA:

extern int RSI_Period = 13;         //8-25
extern int RSI_Price = 0;           //0-6
extern int Volatility_Band = 34;    //20-40
extern int RSI_Price_Line = 2;      
extern int RSI_Price_Type = 0;      //0-3
extern int Trade_Signal_Line = 7;   
extern int Trade_Signal_Type = 0;   //0-3

double RSIBuf[],UpZone[],MdZone[],DnZone[],MaBuf[],MbBuf[];

int init()
  {
   IndicatorShortName("Traders Dynamic Index");
   SetIndexBuffer(0,RSIBuf);
   SetIndexBuffer(1,UpZone);
   SetIndexBuffer(2,MdZone);
   SetIndexBuffer(3,DnZone);
   SetIndexBuffer(4,MaBuf);
   SetIndexBuffer(5,MbBuf);
   
   SetIndexStyle(0,DRAW_NONE); 
   SetIndexStyle(1,DRAW_LINE); 
   SetIndexStyle(2,DRAW_LINE,0,2);
   SetIndexStyle(3,DRAW_LINE);
   SetIndexStyle(4,DRAW_LINE,0,2);
   SetIndexStyle(5,DRAW_LINE,0,2);
   
   SetIndexLabel(0,NULL); 
   SetIndexLabel(1,"VB High"); 
   SetIndexLabel(2,"Market Base Line"); 
   SetIndexLabel(3,"VB Low"); 
   SetIndexLabel(4,"RSI Price Line");
   SetIndexLabel(5,"Trade Signal Line");
 
   SetLevelValue(0,50);
   SetLevelValue(1,68);
   SetLevelValue(2,32);
   SetLevelStyle(STYLE_DOT,1,DimGray);
   
   return(0);
  }

int start()
  {
   double MA,RSI[];
   ArrayResize(RSI,Volatility_Band);
   int counted_bars=IndicatorCounted();
   int limit = Bars-counted_bars-1;
   for(int i=limit; i>=0; i--)
   {
      RSIBuf[i] = (iRSI(NULL,0,RSI_Period,RSI_Price,i)); 
      MA = 0;
      for(int x=i; x<i+Volatility_Band; x++) {
         RSI[x-i] = RSIBuf[x];
         MA += RSIBuf[x]/Volatility_Band;
      }
      UpZone[i] = (MA + (1.6185 * StDev(RSI,Volatility_Band)));
      DnZone[i] = (MA - (1.6185 * StDev(RSI,Volatility_Band)));  
      MdZone[i] = ((UpZone[i] + DnZone[i])/2);
      }
   for (i=limit-1;i>=0;i--)  
      {
       MaBuf[i] = (iMAOnArray(RSIBuf,0,RSI_Price_Line,0,RSI_Price_Type,i));
       MbBuf[i] = (iMAOnArray(RSIBuf,0,Trade_Signal_Line,0,Trade_Signal_Type,i));   
      } 
//----
   return(0);
  }
  
double StDev(double& Data[], int Per)
{return(MathSqrt(Variance(Data,Per)));
}
double Variance(double& Data[], int Per)
{double sum, ssum;
  for (int i=0; i<Per; i++)
  {sum += Data[i];
   ssum += MathPow(Data[i],2);
  }
  return((ssum*Per - sum*sum)/(Per*(Per-1)));
}

All 6 of the indicator buffers:

RSIBuf[],UpZone[],MdZone[],DnZone[],MaBuf[],MbBuf[];

are throwing an array out of range error inside the EA during testing. What do I have to change to get this running? I've been doing a lot of searching for similar topics but can't seem to figure this out. All the code is in the correct place.