Volume Profiling non-Time Based Charts
When applying start and stop times or a specific number of minutes to the Profile Indicator, Investor/RT is using the begin and end times of the bars in the chart to determine when to begin and end the Profile Indicator. On a Time based chart this is easy since each bar tends to start and stop at an even minute interval.
However, when adding a Profile Indicator to a non-time based chart (Volume, Tick, Range or Change bar charts), each bar does not have an even begin and end time and these times are not known until after a bar closes and a new one opens.