Quote from j_medved:
the total time displayed on the X axis of the chart is the time period. The time covered by each bar is the frequency. So if you have a 10 day, 60 min freq chart, you will see 70 bars (7 bars per day)
OHLC - QT resizes the bars dynamically as needed. Try it
OK, I get it. Never heard of ANYBODY using "time period " that way before though. 99% of traders will refer to time period in the way you refer to frequency. They don't usually even mention limitations for the total period.
For example, who would say "bring up a 5 min chart, but limit it to 2 days"? imo, the max possible for the "frequency" should always be displayed.
Just a thought.
Jay