(MP) Stands for “Time Price Opportunity”. It is the smallest unit of measure displayed any market profile graphic, denoted by a single letter. Each TPO represents a point of time where the market being charted trades at a specific price. A single TPO is printed on the chart every time that a certain price is touched during any time period. Typically, the periods are set to 30 minutes. Therefore, every different letter that you see in the market profile distribution denotes a different 30 minute period.