Hi Columbus,
I think I had not made it clear earlier. Let me try with an example.
Say, @ EOD today, the series range is 500 points and Today's range (i.e., Today's High - Today's Low) is 50 points. In this case, 10% of the series range was occupied today. Next EOD it could be 14%, 8 %, etc.
Representation: Line chart of this occupied percentage of the series range.