Script having problem with Candles array

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My Script is trying to access the iClose(....), iOpen(...), iHigh(...), and iLow(...) arrays.

It appears however, that this array remains constant.

ie:
iClose(Symbol(),PERIOD_M1,1) 10 minutes ago
and iClose(Symbol(),PERIOD_M1,1) now, is the same.
 
Show your code illustrating problem
 
This is a script not indicator, not EA.

int start() {
	int spike;
	while (true) {
		RefreshRates();
		spike = NormalizeDouble( (Bid - iClose(Symbol(),PERIOD_M1,1)) / Point, 0);

		if (spike > SpikeDanger) {
			Comment("Danger!");
			PlaySound("alert.wav");
		}
		Sleep(100);
	}
	return(0);
}



When I run it, it wont give me a new iClose value...

 
I checked it, and it works properly !
//+------------------------------------------------------------------+
//|                                                  CheckiClose.mq4 |
//|                      Copyright © 2007, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.ru/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.ru/"

int SpikeDanger=5;
//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
//----

	int spike;
	while (true) {
		RefreshRates();
		spike = NormalizeDouble( (Bid - iClose(Symbol(),PERIOD_M1,1)) / Point, 0);
      Comment("Bid=",Bid,"   iClose(Symbol(),PERIOD_M1,1)=",iClose(Symbol(),PERIOD_M1,1) );
		if (spike > SpikeDanger) {
			Alert(Symbol()+"- Danger!");
			PlaySound("alert.wav");
		}
		Sleep(300);
	}

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