A trending situation where in an uptrend the low of the previous TPO(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. period is not broken by two ticks or more. In a downtrend it would be reversed and the high of any previous TPO(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. period is not broken by two ticks or more.