UPDATE 3/10/10:

Added additional text that show ticks remaining (same value as the shown in the range counter) and ticks completed.
Fixed right‐of‐decimal formatting to use a consistent number of decimal places.
Fixed some doubles rounding issues.
Added option to set text color.

This indicator is for range charts only. It will draw a box around the current candle that indicates how much further a bar would have to move before the range is exhausted and new bar begins to paint.

This box is dynamic in that it adjusts in height based on the current size of the candle. In this way it is always indicating the maximum extent possible for the current candle.

It will also highlight this box using colors depending on how close the candle size is the maximum. Optionally, this indicator can also print the high and low price of the box's range just above and below the box itself.

I'll admit this may be more eye candy than anything else but I thought I'd offer it up anyway.

Full info can be found here along with NT7 version: RangeMarker Information