I have a mixed database with 5-minute data as the lowest resolution. 
  
I've got EOD-quotes from Yahoo and intraday from OpenTick.
I'm 
  working on an exploration where I want to get the size of the 
Opening Gap. 
  Currently my code looks like this:
TimeFrameSet 
  (inDaily);
OpeningGap = (0 - Ref (C, -1));
OpeningGapPct = (OpeningGap / 
  Ref (C, - 1)) * 100;
Filter = OpeningGapPct > 0.1;
(The 0.1% gap 
  is to test the code).
However, the result of my exploration show 5-minute 
  bars where the gap 
occurs, not daily bars. What am I 
  missing?