Market Profile organises price data into 30-minute periods called TPOs (Time Price Opportunities), creating a bell-curve distribution that reveals market behaviour patterns. Developed by J. Peter Steidlmayer at the CBOT, Market Profile identifies day types (Normal, Trend, Double Distribution, etc.) and provides a statistical framework for understanding auction market theory.
TPO (Time Price Opportunity): each 30-minute letter block, Initial Balance (IB): first hour of trading range, Day types: Normal, Normal Variation, Trend, Double Distribution, Neutral, p-shape profile: rally with buying tail (potential short), b-shape: decline with selling tail (potential long), D-shape: balanced/rotational, Single prints: fast moves through price levels (future support/resistance)
Normal day: trade within the value area. Trend day: trade in trend direction only. Double distribution: trade breakout of initial range. Opening outside the previous value area on a gap: trend day likely. IB extension trades in the direction of the break.
Rotation day exit: opposing value area boundary. Trend day exit: trail using 30-minute TPO structures. IB extension target: 1×, 1.5×, or 2× the IB range projected in the extension direction.
30M TPO periods are the standard unit. Session analysis on daily. Weekly composite for context.
Market Profile is most useful for understanding the type of day you're in. A trend day requires different behaviour than a rotation day. Identifying the day type early (by the third or fourth TPO period) gives you an edge for the rest of the session.
Delta is the difference between aggressive buying volume (market orders hitting the ask) and aggressive selling volume (market orders hitting the bid) within a candle or time period. Cumulative delta tracks the running total over time. Divergence between price and cumulative delta reveals whether rallies/selloffs have genuine buyer/seller conviction.
Time and sales, commonly referred to as the tape, displays every executed trade in real time, showing the price, size, and whether the trade was executed at the bid or the ask. Tape reading is the art of interpreting this flow of transactions to gauge real-time buying and selling pressure, identify institutional activity, and spot absorption or exhaustion before they appear on charts.
Volume Profile displays the total volume traded at each price level over a specified period (session, week, month, or visible range). Unlike time-based volume histograms, volume profile shows WHERE trading activity concentrated. Key levels include the Point of Control (POC), Value Area, and High/Low Volume Nodes.
Footprint charts display the actual volume traded at each price level within a candle, broken down by aggressive buyers (market orders hitting the ask) and aggressive sellers (market orders hitting the bid). This granular view reveals exactly where buying and selling pressure occurs, exposing absorption, exhaustion, and imbalance patterns invisible on standard charts.