Steidlmayer on Markets: Trading with Market Profile - Extended Summary

Author: J. Peter Steidlmayer | Categories: Auction Market Theory, Market Profile, Trading

About This Summary

This is a PhD-level extended summary of "Steidlmayer on Markets," the foundational text on Market Profile written by its creator, J. Peter Steidlmayer. This summary covers the complete intellectual framework behind Market Profile, from its origins in the Chicago Board of Trade (CBOT) trading pits to its application as a universal market analysis tool. Steidlmayer's original thinking is preserved here with attention to the conceptual depth that distinguishes his work from later interpretations.

Executive Overview

J. Peter Steidlmayer created Market Profile in the early 1980s while working as a floor trader at the Chicago Board of Trade. Frustrated by the limitations of traditional bar charts, which showed only open, high, low, and close, Steidlmayer sought a way to visualize HOW the market spent its time at various price levels during the day. The result was the Time-Price Opportunity (TPO) chart, which reveals the market's acceptance or rejection of price levels through the distribution of time.

"Steidlmayer on Markets" presents the creator's own philosophy, unfiltered. Unlike later books that focus on practical application (such as Dalton's work), Steidlmayer's writing emphasizes the theoretical underpinnings: why the market behaves as it does, what the auction process reveals about participant behavior, and how the distribution of time at price creates a statistical framework for understanding value. His central argument is that the market is a self-organizing system whose primary function is to facilitate trade, and that all price movement can be understood through this lens.

The book is both a historical document and a living framework. It captures a specific moment in market history, the transition from pit trading to electronic markets, while articulating principles that are timeless. Steidlmayer's concepts have been adopted, extended, and sometimes distorted by subsequent authors, making it essential to return to the source material.

Part I: Origins and Philosophy

The CBOT and the Birth of Market Profile

Steidlmayer developed Market Profile from his experience as a pit trader at the Chicago Board of Trade during the 1970s and 1980s. In the pit, traders had an intuitive sense of the market's structure that was invisible to outside observers. They could feel when the market was "balanced" or when directional pressure was building. The challenge was translating this intuitive understanding into an objective, visual framework.

The key breakthrough was recognizing that TIME is a dimension of market information that traditional charts ignore. A bar chart showing that the S&P futures traded between 1100 and 1120 tells you nothing about whether the market spent 90% of its time at 1115 (indicating value) or 90% of its time at 1100 (indicating a sell-off that was quickly absorbed).

Key Insight: Price tells you what happened. Time tells you what it meant. A price level visited for one 30-minute period was rejected. A price level visited for eight 30-minute periods was accepted. This distinction is the foundation of Market Profile.

The Market as a Two-Way Auction

Steidlmayer's foundational metaphor is the market as a two-way auction. In a traditional auction, bidding goes in one direction (up). In a market, the auction moves in both directions simultaneously. The market probes higher, seeking sellers, and probes lower, seeking buyers. The result is a continuous negotiation between two sides.

This two-way auction has a specific purpose: to facilitate trade. The market is not trying to go up or down. It is trying to find the price where the maximum number of transactions can occur. When it finds that price, it stays there (balance). When external factors change the equation, it moves to find a new price (imbalance).

The Facilitation Principle:

The Statistical Foundation

Steidlmayer recognized that the distribution of time at price levels follows a normal (bell curve) distribution during balanced conditions. This is not accidental; it is a natural consequence of the auction process. In a balanced market:

• The mode (most visited price) is the Point of Control
• Approximately 70% of activity (one standard deviation) forms the Value Area
• The extremes represent rejection (the market tested those prices and found insufficient interest)

This statistical framework gives Market Profile its predictive power. If you know the value area, you know where the market is likely to spend most of its time. Deviations from value create mean-reversion opportunities. Shifts in value create trend-following opportunities.

Part II: TPO Construction and Reading

Building a TPO Chart

The TPO chart divides the trading session into 30-minute periods, each assigned a sequential letter:

For each price level traded during a period, the corresponding letter is printed. If the A period trades at prices 100, 101, 102, and 103, the letter "A" is printed at each of those four levels. Over the course of the day, the accumulation of letters creates the profile.

Reading the Profile

The completed profile communicates several things at a glance:

1. Where value was established: The widest part of the profile (most letters stacked horizontally) is where the market spent the most time. This is the value area.

2. Direction of the auction: If the profile is skewed upward (more activity in the upper half), the auction was predominantly bullish. If skewed downward, bearish.

3. Speed of movement: Areas with single prints (only one letter) indicate fast, initiative movement. The market moved through these prices quickly, without accepting them.

4. Completeness of the auction: Well-formed tails at the extremes (multiple letters stacking at the high or low) indicate the auction found natural termination points. Flat, blunt extremes (poor highs/lows) indicate the auction may not be complete.

The Anatomy of a Profile

Price   | TPO Distribution          | Interpretation
--------|---------------------------|---------------------------
110     | K                         | Tail (excess at the high)
109     | JK                        | Tail continuation
108     | JKL                       | Range extension zone
107     | HIJKL                     | Upper value area boundary
106     | GHIJKLM                   | Point of Control
105     | FGHIJKLM                  | Lower value area boundary
104     | EFGH                      | Range extension zone
103     | DEF                       | Tail zone
102     | D                         | Tail (excess at the low)

In this example:

• Value Area: 105-107 (where the profile is widest)
• Point of Control: 106 (the single price with the most TPOs)
• Buying Tail: 102-103 (single prints at the bottom indicate responsive buying)
• Range Extension: 108-110 (activity beyond the first hour's range, indicating OTF participation)

Part III: Value Area and Point of Control

Calculating the Value Area

Steidlmayer's method for calculating the value area:

1. Identify the Point of Control (the price with the most TPOs)
2. Count the TPOs at the next price above the POC
3. Count the TPOs at the next price below the POC
4. Add whichever has MORE TPOs to the value area
5. If tied, add both
6. Continue alternating until approximately 70% of total TPOs are included

This 70% threshold corresponds to one standard deviation of a normal distribution, reinforcing the statistical foundation.

Value Area Applications

The value area from the prior session provides reference points for the current session:

Value Area High (VAH): The top of the prior value area. If the market opens above this level, it suggests initiative buying. If the market rallies to this level and is rejected, it suggests responsive selling.

Value Area Low (VAL): The bottom of the prior value area. If the market opens below this level, it suggests initiative selling. If the market declines to this level and is supported, it suggests responsive buying.

Point of Control (POC): The fairest price. In a balanced market, price tends to gravitate toward the POC. It acts as a magnet for rotational activity.

The Value Area Rule

Steidlmayer articulated what has become known as the "Value Area Rule" for opening scenarios:

Key Insight: The value area rule is one of the few "mechanical" applications of Market Profile that Steidlmayer endorsed. Its power comes from the statistical regularity of the normal distribution: once within the value area, the market has a measurable tendency to visit the opposite extreme or the POC.

Part IV: Market Structure and Behavior

Initiative vs. Responsive Behavior

Steidlmayer formalized the distinction between initiative and responsive market behavior, which is perhaps the most important analytical framework in all of Market Profile analysis.

Initiative behavior occurs when participants actively push price in a direction, away from the established value. They are initiating new activity, expressing a view that value should move.

Responsive behavior occurs when participants react to price moving away from value by trading back toward it. They are responding to an opportunity created by price's deviation from accepted value.

Classification Framework:

This 2x2 matrix is the core analytical engine. At any moment, you can classify the dominant activity and understand its implications for the auction.

Inventory Adjustment

Steidlmayer introduced the concept of inventory adjustment as a driver of short-term market behavior. Market makers (specialists, locals, dealers) must maintain inventory to facilitate trade. When their inventory becomes too long (too much stock) or too short (too little stock), they adjust price to attract the other side.

The Inventory Cycle:

Market maker accumulates long inventory
    |
    v
Market maker lowers offer to attract sellers / reduce long
    |
    v
Price dips; responsive buyers absorb the offering
    |
    v
Inventory normalizes
    |
    v
Market maker accumulates short inventory
    |
    v
Market maker raises bid to attract buyers / reduce short
    |
    v
Price rallies; responsive sellers absorb the bid
    |
    v
Inventory normalizes -> Cycle repeats

This micro-level process creates the intraday rotations visible on the profile. Understanding it helps traders avoid mistaking inventory adjustment for genuine directional movement.

Facilitation of Trade

The market's primary function is facilitating trade. Price moves are the mechanism by which the market discovers the level where trade is most easily facilitated. When trade is being facilitated, the market is balanced and the profile builds out horizontally. When trade is not being facilitated, the market moves vertically, searching for a price where both sides will participate.

Facilitation Assessment:

Part V: The Other Timeframe Participant

Defining the OTF

The "other timeframe" (OTF) participant is any trader or institution operating on a longer time horizon than the day timeframe. Steidlmayer recognized that the most significant market moves are driven by participants whose perspective extends beyond the current session.

The OTF does not trade for intraday profit. They are building positions for multi-day, multi-week, or longer holding periods. Because of their longer time horizon, they are less sensitive to intraday noise and more focused on value.

OTF Footprints in the Profile

The OTF's activity creates specific signatures in the profile:

1. Range Extension: The IB is set by day-timeframe traders. Extension beyond the IB requires longer-timeframe conviction. Significant range extension (greater than 50% of the IB range) strongly suggests OTF participation.

2. Single Prints: When the OTF enters aggressively, price moves so fast that only single TPOs print at each level. This fast movement indicates that the OTF does not need to wait for day-timeframe traders to participate; they are moving price on their own.

3. Excess (Tails): When the OTF enters at an extreme to reject a price level, they create tails. A long buying tail at the session low means the OTF aggressively bought at those prices, pushing price away rapidly.

4. Value Area Shift: If the value area shifts significantly from one session to the next (especially outside the prior VA), the OTF has altered the market's perception of fair value.

OTF Tracking Across Sessions

Steidlmayer emphasized tracking OTF activity across multiple sessions to understand the larger auction:

Key Insight: The OTF does not announce themselves. They do not issue press releases. But their activity is unmistakable in the profile if you know what to look for. Track them across sessions, not within a single day.

Part VI: Opening Types and Their Signals

The Four Opening Types

Steidlmayer identified four primary opening types, each signaling a different level of conviction and likely day development:

1. Open-Drive

The market opens and immediately drives in one direction with no pullback. This is the strongest opening signal, indicating that the OTF has already made their decision and is executing aggressively.

• Profile Signature: Extension begins in the A period; single prints develop immediately
• Likely Day Type: Trend or Double Distribution
• Trading Response: Enter in the drive direction immediately; do not wait for a pullback (it may never come)
• Risk Level: Stop below the opening price (for a bullish open-drive) or above (for bearish)

2. Open-Test-Drive

The market opens, briefly tests prices in the opposite direction (often retesting the prior session's close or a reference level), and then drives in the opposite direction with conviction.

• Profile Signature: A period shows brief two-sided activity; B period establishes direction
• Likely Day Type: Normal Variation or Double Distribution
• Trading Response: Enter after the test confirms direction; the test provides better entry than an open-drive
• Risk Level: Stop beyond the extreme of the test

3. Open-Rejection-Reverse

The market opens and moves in one direction, but meets decisive rejection and reverses to move in the opposite direction for the remainder of the session.

• Profile Signature: A period extends in one direction; B and C periods reverse and extend opposite
• Likely Day Type: Double Distribution or P/b shape
• Trading Response: Wait for the rejection to be confirmed before entering; the reversal direction is the trade
• Risk Level: Stop beyond the rejected extreme

4. Open-Auction

The market opens and auctions in both directions without establishing clear conviction. This is the most common opening type and typically leads to a balanced, rotational session.

• Profile Signature: A and B periods overlap significantly; no clear extension
• Likely Day Type: Normal or Neutral
• Trading Response: Wait for the IB to be established; trade responsively within the range
• Risk Level: Use IB extremes as reference points

Opening Type Decision Matrix

Part VII: Market Activity Classification

Day Structure Analysis

Steidlmayer classified days not just by their final profile shape but by how the profile developed. The process of the day's development reveals the interplay between timeframes.

Phase 1: Opening (A-B periods) The first hour sets the Initial Balance. This is primarily the domain of day-timeframe traders establishing positions based on overnight information, the prior session's close, and early order flow.

Phase 2: Development (C-G periods) The middle of the session is where the OTF typically enters. If they are active, range extension occurs. If they are absent, the market rotates within the IB.

Phase 3: Resolution (H-M periods) The final hours reveal the session's conclusion. Where the market closes relative to the value area and the day's range provides the strongest signal for the next session.

Close Analysis

Continuation vs. Reversal Signals

Steidlmayer provided a framework for assessing whether the current session's action is likely to continue or reverse:

Continuation Signals:

• Open in the direction of the prior session's trend (above prior VA if bullish)
• IB extends the prior session's range in the same direction
• Value area shifts further in the trend direction
• No responsive activity at the prior session's extreme
• Increasing range extension through the session

Reversal Signals:

• Open in trend direction but immediate failure to extend
• Long tail (excess) forming at the extreme in the trend direction
• Value area failing to shift despite price extension
• Responsive activity dominating at new price levels
• The profile developing a P-shape (after an uptrend) or b-shape (after a downtrend)

Part VIII: Evolution from Pit to Screen

The Pit Trading Advantage

Steidlmayer's early work was informed by the unique information available to pit traders. In the pit, a trader could observe:

• The size and urgency of incoming orders
• The body language and positioning of other traders
• The flow of paper (institutional orders) vs. local trading
• The pace and rhythm of the auction in real time

This rich, multi-sensory information stream gave pit traders an intuitive understanding of market structure that was difficult to replicate on a screen.

Adapting to Electronic Markets

As markets transitioned to electronic trading, the challenge was preserving the analytical value of Market Profile in an environment where the visual and auditory cues of the pit were absent. Steidlmayer argued that the profile itself captures the essential information:

• Time at price replaces the visual density of the crowd at a price level
• Volume at price replaces the auditory volume of the pit
• Range extension replaces the feeling of directional momentum
• Profile shape replaces the intuitive sense of market balance or imbalance

Key Insight: The transition from pit to screen removed much of the noise while preserving the signal. In the pit, a trader had to filter an enormous amount of sensory data. On screen, the profile distills that data into a clean, objective format. In some ways, the profile is a superior information source because it eliminates the emotional and cognitive biases inherent in pit trading.

Modern Applications

Steidlmayer's concepts have been extended for modern markets:

1. Electronic volume data can now be integrated with the TPO profile to create Volume Profile charts that show actual transaction volume at each price level
2. Globex/overnight sessions extend the trading day, requiring adaptation of the IB and value area calculations
3. Multi-market analysis applies Market Profile concepts across correlated instruments
4. Algorithmic implementation allows automated classification of day types, opening types, and initiative/responsive behavior

Visual Framework: Market Profile Analysis Process

Decision Flowchart: TPO-Based Trade Selection

START: Current session developing
    |
    +--> What is the opening type?
    |       |
    |       +--> OPEN-DRIVE
    |       |       -> Trade in drive direction immediately
    |       |       -> Stop: Beyond opening price
    |       |       -> Target: None (trail stop; trend day likely)
    |       |
    |       +--> OPEN-TEST-DRIVE
    |       |       -> Wait for test to complete
    |       |       -> Enter in drive direction
    |       |       -> Stop: Beyond test extreme
    |       |       -> Target: Prior day's VA extreme in direction
    |       |
    |       +--> OPEN-REJECTION-REVERSE
    |       |       -> Wait for rejection confirmation
    |       |       -> Enter in reversal direction
    |       |       -> Stop: Beyond rejected extreme
    |       |       -> Target: Prior day's POC
    |       |
    |       +--> OPEN-AUCTION
    |               -> Wait for IB to form
    |               |
    |               +--> Is IB narrow (bottom 20% of recent range)?
    |               |       -> Trend day potential
    |               |       -> Watch for range extension direction
    |               |       -> Enter on first range extension
    |               |
    |               +--> Is IB average or wide?
    |                       -> Rotational day likely
    |                       -> Sell near IB high (responsive)
    |                       -> Buy near IB low (responsive)
    |                       -> Target: IB midpoint or POC
    |
    +--> Has range extension occurred?
    |       |
    |       +--> YES, one side: Is it initiative?
    |       |       |
    |       |       +--> YES: Position in extension direction
    |       |       +--> NO: Likely false breakout; fade
    |       |
    |       +--> YES, both sides: Neutral day developing
    |       |       -> Reduce position size
    |       |       -> Trade the range center
    |       |
    |       +--> NO: Market still in IB
    |               -> Be patient
    |               -> Monitor for breakout setup
    |
    +--> Where are we relative to prior day's VA?
            |
            +--> ABOVE: Bullish context
            |       -> Buy pullbacks to prior VAH
            |       -> Stop: Below prior VAH
            |
            +--> BELOW: Bearish context
            |       -> Sell rallies to prior VAL
            |       -> Stop: Above prior VAL
            |
            +--> WITHIN: Neutral context
                    -> Trade responsively between VA extremes

Complete Checklist: Steidlmayer Market Profile Mastery

Conceptual Understanding

• Can you explain the two-way auction in your own words?
• Do you understand why time at price is more informative than price alone?
• Can you articulate the difference between initiative and responsive behavior?
• Do you understand the inventory adjustment cycle?
• Can you identify all four opening types?
• Do you understand the role of the other-timeframe participant?
• Can you explain the facilitation concept?

Daily Practice

• Construct or review the prior session's TPO chart
• Calculate and mark the value area (VAH, VAL, POC)
• Identify the prior session's day type
• Note any excess (tails) or poor structure (poor highs/lows)
• Classify the opening type within the first 30 minutes
• Measure the IB relative to recent sessions
• Monitor for range extension and classify it as initiative or responsive
• Assess the developing day type by mid-session
• Analyze the close relative to the value area
• Record observations in a trading journal

Advanced Skills

• Create and analyze multi-day composite profiles
• Track OTF behavior across multiple sessions
• Identify bracket formations and their maturity
• Recognize paradigm shifts through profile character changes
• Integrate volume data with TPO analysis
• Apply the value area rule mechanically and track results
• Classify initiative vs. responsive behavior in real time

Key Quotes & Annotations

"The market's purpose is to facilitate trade." - This is the first principle. Not to make money for bulls or bears, but to find the price where trade occurs most efficiently. Everything flows from this understanding.

"Time is the market's regulator." - When the market spends time at a price level, it is accepting it. When it spends no time, it is rejecting it. Time is the most honest indicator in the market because it cannot be fabricated.

"The other timeframe controls the market." - Day traders create structure; the OTF creates direction. This hierarchy is essential for understanding who is truly in charge of the market at any given moment.

"Price is a mechanism of advertisement." - Price does not represent value. Price advertises to attract the opposite side. When price moves far above value, it is advertising for sellers. When it moves far below, it is advertising for buyers.

"The profile is a picture of the market's organized behavior." - The profile is not just a chart. It is a complete record of how the market allocated time across price levels. It is the market's own summary of itself.

"You don't need to predict. You need to observe and respond." - Steidlmayer was deeply skeptical of forecasting. His methodology is about reading what is happening, not predicting what will happen. The profile gives you real-time feedback that allows responsive decision-making.

Critical Analysis

Strengths

1. Original source material. This is the creator's own explanation of his creation. There is no telephone-game distortion. Reading Steidlmayer directly gives you the purest understanding of Market Profile's intended use and philosophy.

2. Conceptual depth. Steidlmayer does not just describe patterns. He explains WHY they occur based on the fundamental dynamics of the auction process. This deeper understanding makes the framework more robust because you can reason from first principles when faced with novel situations.

3. Universal applicability. The auction process operates in every market: stocks, bonds, commodities, currencies, real estate, and even non-financial markets. The concepts in this book apply wherever buyers and sellers negotiate.

4. Statistical foundation. The normal distribution framework gives Market Profile a mathematical grounding that most technical analysis lacks. The value area is not an arbitrary zone; it is one standard deviation of the time distribution.

5. Microstructure insight. Steidlmayer's floor trading experience gives him unique insight into market microstructure. His description of inventory adjustment, facilitation, and the OTF is informed by direct observation, not theory.

Weaknesses

1. Dense and sometimes opaque writing. Steidlmayer writes like a floor trader who thinks deeply but expresses himself tersely. Many passages require multiple readings. The ideas are profound but not always clearly communicated.

2. Historical specificity. Some examples and references are specific to the CBOT grain and bond markets of the 1980s and may feel dated to modern readers. The principles translate, but the illustrations sometimes need mental updating.

3. Limited practical guidance. Compared to Dalton's works, this book provides less step-by-step practical guidance. It is more philosophical than operational. Traders looking for specific setups and rules will need to supplement with other resources.

4. Minimal risk management framework. The book focuses on market understanding rather than trade management. Position sizing, stop placement, and profit-taking are not covered in the depth that modern traders need.

5. No discussion of algorithmic trading. Given the book's publication era, there is no discussion of how to integrate Market Profile concepts with automated trading systems, which is how many modern participants apply these ideas.

Modern Relevance

Steidlmayer's framework has aged remarkably well because it describes the permanent characteristics of markets rather than temporary features. The auction process has not changed since the first markets opened in antiquity. What has changed is the speed and the participants, but the underlying dynamics remain identical.

The book is most valuable today as a conceptual foundation. Modern practitioners should read it to understand the "why" behind Market Profile, then turn to Dalton's "Markets in Profile" and "Mind Over Markets" for the "how." The combination of Steidlmayer's philosophy and Dalton's practical framework creates a complete education.

Reading Recommendations

Before reading this book:

• Basic understanding of financial markets and trading
• Familiarity with candlestick or bar charts
• A genuine interest in market microstructure (this is not a casual read)

After reading this book:

• "Mind Over Markets" by James Dalton (practical application of the concepts Steidlmayer introduces)
• "Markets in Profile" by James Dalton (the advanced continuation)
• Practice constructing TPO charts by hand to deeply internalize the concept of time at price

Complementary reading:

• "Trading and Exchanges" by Larry Harris (academic market microstructure)
• "Market Microstructure Theory" by Maureen O'Hara (theoretical foundations)
• "The Auction Market Theory" by various CBOT educational materials (historical context)

Final Verdict

Rating: 4.5/5

Who it's for: Serious students of market structure who want to understand the intellectual foundations of Market Profile from its creator. Required reading for anyone who uses Market Profile or Auction Market Theory in their trading. Not for beginners or those seeking quick, actionable setups.

One-line takeaway: Steidlmayer on Markets is the genesis text of Market Profile analysis, offering the deepest available insight into why markets organize themselves through the auction process and how the distribution of time at price reveals everything you need to know about value and participant behavior.