Retrieve highest bar value for a period...

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Hello All,

Edited: Looks like I have cracked this, code below - but constructive enhancements/comments are welcome.

I am trying to retrieve the highest value from the highest bar within a given period.

If I specify from 03:00 to 06:00 what I get back are prices for close to now (say 11:00). What I seem to be retrieving are figures from close to now.

I am new to MQL5 and it's vast array of features, but not new to C & C++.

/* range_high()
 * 
 * Discovers the highest bar value for the period passed as parameters
 *
 * Parameters: symbol string like "GBPUSD"
 *             from: datetime, start of period requested - should be within a day
 *             to: datetime, end of period requested - should be within same day
 *             timeframe: ENUM_TIMEFRAMES being evaluated
 *
 * Returns: double, on failure 0
 *                  on success the highest bar value for the period requested
 */
double range_high(string symbol, datetime from, datetime to, ENUM_TIMEFRAMES timeframe) 
{ 
   int highest_candle;
   MqlRates prices[];
   double high_range[];
   double high_val = 0;
   int n;
   
   ArraySetAsSeries(prices, true);
   ArraySetAsSeries(high_range, true); 
   n = CopyHigh(symbol, timeframe, from, to, high_range);
   if( n > 0 ) {
      highest_candle = ArrayMaximum(high_range, 0);
      n = CopyRates(symbol, timeframe, from, to, prices);
      if( n > 0 )
         high_val = prices[highest_candle].high;
   } else
      Print(__FUNCTION__, ": Couldn't copy from ", from, ", to ", to);   
   return( n > 0 ? high_val : 0 );
}
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