Value Area & Point of Control

Overview

If the Market Profile is the shape of the day, the value area and point of control are its two most important prices. The value area is the range where roughly 70% of the session's trade took place — the prices the market accepted as fair. The point of control (POC) is the single price with the most activity: the day's center of gravity.

Together they answer the trader's first question every morning: where is fair value, and is price above it, below it, or inside it right now?

Why 70%?

• STATSThe value area was defined as the central ~70% of trade deliberately, to line up with the first standard deviation of a normal (bell) distribution — about 68%, rounded.¹ It's a statistical convention, not a magic number.
• 1980sThe definition comes from Steidlmayer's original Market Profile work at the CBOT; Dalton made it central to trading decisions in Mind Over Markets.²

The anatomy

Three prices do most of the work:

• ·POC — point of control. The most-traded price; a magnet the market often returns to. Yesterday's POC is a key reference for today.
• ·VAH / VAL — value-area high and low. The upper and lower edges of accepted value. They act as support/resistance and as decision points: accept beyond them or reject back inside?
• ·The tails. Single-print extremes outside value = strong rejection (excess), often the day's firmest levels.

Value migration & the overnight map

The single most useful habit is comparing today's developing value to yesterday's. Where price opens relative to prior value sets the tone:

• OPEN INSIDEOpen within yesterday's value → the market accepts prior value; expect rotation and a higher chance of a balanced, range-bound day.
• OPEN OUTSIDE / ACCEPTOpen outside value and stay → value is migrating; a new area of agreement is forming, favoring trend continuation. See imbalance.
• OPEN OUTSIDE / REJECTOpen outside value but snap back in → the breakout failed; the market re-accepts old value (a classic fade back toward the POC).

Higher value day-over-day = the auction is trending up; lower value = trending down; overlapping value = balance. This migration read is the bridge to day types and initiative vs. responsive activity.

The "80% rule" (a common heuristic): if price opens outside the prior value area, then re-enters it and trades there for two consecutive brackets, it often rotates across to the far side of value. It's a rule of thumb, not a guarantee — use it as a lean, not a signal.

Trading with vs. against value

The whole skill is telling which regime you're in before choosing which playbook applies — balance rewards fading the edges; imbalance punishes it.

Honest assessment

Strengths

Value and the POC give you objective, market-generated reference prices — not drawn by hand. They define where to expect rotation, where a break becomes meaningful, and where to place low-risk stops. Yesterday's value area is one of the highest-quality maps you can bring to a new session.

The honest limits

Value edges are not walls. In a trending market, price blows through VAH/VAL and never looks back — fading them is how traders get run over. The 70% definition and even the POC shift with your data source, session times and TPO-vs-volume choice. And like the rest of the framework, it works best on liquid, centrally-traded instruments with clean volume.

Evidence rating: value and POC are genuinely useful, objective reference levels widely used by professionals — but they describe where agreement was, and must be combined with a regime read (balance vs. trend) and risk control, not traded blindly.

Practice

This concept in the knowledge graph

Resources

• TRADERDalton (value & the auction) & Steidlmayer (the tool).
• STRATEGYValue-area fade — the responsive playbook built on this page.
• BOOKMind Over Markets.