Time Price Opportunity (TPO) is a fundamental concept in Market Profile analysis that measures how much time the market spends at specific price levels during a trading session. Developed by trader and market theorist J. Peter Steidlmayer, TPO helps traders understand where the market finds value and where buyers and sellers are most active.

In a Market Profile chart, each letter or symbol represents a specific period of time, often 30 minutes. Whenever the market trades at a particular price level during that period, a TPO is recorded. As the session progresses, these letters accumulate horizontally, creating a profile that shows how much time price spent at each level. The more TPOs a price level has, the more accepted that price is considered by market participants.

TPO analysis is based on the idea that markets operate like auctions. Prices where many TPOs accumulate are viewed as fair value areas because the market spent significant time there. Conversely, price levels with few TPOs indicate rejection or lack of interest from traders. This information helps identify important areas such as the Point of Control (POC), Value Area High (VAH), and Value Area Low (VAL).

Traders use TPOs to gauge market sentiment, identify support and resistance zones, and anticipate potential breakouts or reversals. For example, a cluster of TPOs around a certain price may act as a strong support or resistance area in future sessions. By analysing where the market spends the most and least time, traders gain valuable insights into market structure and participant behaviour, allowing them to make more informed trading decisions.