TPO Market Profile & Auction Theory Terminal
TPO Chart Explained: What is Time Price Opportunity and How to Use VAH, VAL & POC in Crypto
Learn what ABC letters mean, how to trade VAH, VAL & Point of Control (POC), and filter crypto fakeouts.
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What is a TPO (Time Price Opportunity) Chart?
Standard candlestick charts emphasize the passage of linear time—every candle represents 15 minutes or 1 hour regardless of whether the market was active or stagnant. In contrast, TPO Market Profile was pioneered by J. Peter Steidlmayer at the Chicago Board of Trade (CBOT) to organize market data around Auction Market Theory.
Each trading session is divided into 30-minute brackets labeled with letters (A, B, C, etc.). Whenever price trades at a specific tick during that 30-minute window, a single letter block is printed. As the session progresses, these letters stack horizontally to form a statistical bell curve displaying where the market spent the most time.
The 4 Classic Market Profile Day Types
Wide Initial Balance (IB) established in the first hour. Price remains contained inside the IB for the rest of the day with responsive buyers and sellers defending extremes.
Elongated, thin profile with continuous range extension in one direction. Value Area shifts dramatically and single prints separate successive distribution blocks.
An initial balance forms, followed by aggressive institutional initiative buying or selling that breaks out and establishes a secondary value area separated by single prints.
Both aggressive buyers and sellers extend the Initial Balance on opposite sides, but neither can sustain conviction, causing price to close near the center POC.
Read our complete institutional guide explaining ABC letters, 70% Value Area rules, poor highs/lows, and mean-reversion scalping.
TPO Profile Feature Guide & Technical Methodology
Time Price Opportunity (TPO) charts—developed under classic Auction Market Theory—organize price discovery by the amount of time spent at specific quotation levels rather than merely plotting volume. Each 30-minute auction bracket is assigned a sequential alphabetical letter (bracket 'A' for the session opening bracket, followed by 'B', 'C', and onward). When multiple brackets trade through identical price coordinates, horizontal letter rows elongate, visually portraying normal Gaussian distribution and highlighting market consensus versus institutional price rejection.
Our TrueData-inspired TPO engine computes the 70% Value Area (one standard deviation around the mode) in real time alongside the Point of Control (POC)—the longest horizontal row representing peak acceptance. Traders track the Initial Balance (IB)—defined by the extremes of the first two brackets (A & B)—to classify session structure. Range extensions outside the IB reveal initiative institutional buying or selling, while single-print tails indicate decisive rejection and establish high-probability support or resistance zones for mean-reversion retests.
How is the 70% Value Area calculated?
The Value Area begins at the Point of Control (POC) and iteratively accumulates the two price levels directly above and below containing the highest combined TPO count until approximately 70% of total session brackets are captured.
What are single prints and excess tails?
Single prints occur when a 30-minute bracket rapidly traverses price levels without overlapping prior or subsequent brackets, leaving single letter columns that denote aggressive institutional conviction and liquidity voids.
Can I split and merge profile sessions?
Yes. Click any daily profile bracket on the chart toolbar to toggle between combined multi-day auction distributions and discrete 24-hour individual sessions to isolate intraday rotations from macro trends.