Ogee wrote: Sat Mar 07, 2020 8:42 pm
The Mode line is simply the max volume within the Mode Step amount set (100 points), if set to 20 there would be more black lines. The Max line is the level with the highest volume that day (or so far that day) and the median is just that, the median of frequency over the total period.

But you don't actually need any of the lines because they are just highlighting what the side-on volume bar graph is showing, you can see the max vol bar (green) occurred 8 - 9 am resulting in a large blue candle telling us that there was excess demand at the end of that auction, price moved higher so for future ref that level may be a strong level of support.
There was a second auction around 2-3 pm that gave the second longest vol bar (black) and that also ended with excess demand and price again moved higher.
The importance of volume and market profile is to highlight which levels are current support and resistance and possibly in the future as well.