Market profile
The session on its side: how long price spent at each level, in the notation profiles have been written in since they were kept by hand.
The gradient is the clock, not decoration.
A block on a profile is not "somebody traded here" — it is "the ninth half hour traded here". Colouring every block the same throws that away and leaves a bell with nothing to read inside it. On Fexora the colour runs across the brackets, so the morning is told from the afternoon at a glance and you can see which part of the day built the shape.
The rows outside the value area are turned down rather than recoloured, so the middle of the profile stays the middle.
Every mark a profile is read for, each one its own switch.
Point of control
The price the session spent longest at, drawn as a line you can extend forward into the days after it.
Value area
The band that held the share of the session you set — 70% by default — with its high and low marked.
Single prints
The rows one bracket touched and nothing came back to. Drawn as a strip beside the row, because a single print is a hole the auction left, not a level to trade.
Poor highs and lows
An extreme that was not cleanly rejected — several brackets stacked flat at the end of the range.
Initial balance
The range of the first brackets of the session, the number of them being yours to set.
Letters or blocks
A, B, C through the session, or plain blocks when you are zoomed out far enough that letters would be a smudge.
A profile per day, per week or per month.
The bracket is yours to choose — one minute through one hour — and the profile period runs by day, week or month. Each session fills the width it actually occupied, so a quiet day is narrow and a long one is wide and the two can be compared along the row they sit on.
Put a profile beside a footprint.
They answer different questions about the same session.