Market Profile key

[Tractorman]

What does the thin vertical red line represent. Is there a small explanation of the market profile chart. I've already viewed the video on Market Profile Improvements but I am looking for just chart basics like green arrows, blue arrows etc.

Thanks
Dave

[DuaneG]

Tractorman,

The thin red line within the Market Profile is referred to as the Initial Balance. This is basically indicating the price range for the first hour of trading of a given symbol.