The hAnDbOOk Of TeChnICAl AnAlysIs
tpO Lettering Convention
In Market Profile, each half hour is assigned a letter ranging from capital A
to X for the initial 12 hours and then followed by a to x for the remaining
12 hours, accounting for a full day’s worth of trading activity. Many markets
do not trade for 24 hours a day, and therefore not all of the letters are used. The
practitioner may of course assign a different time period to the TPOs instead of
figure 17.10 Finding the Volume‐Based Value Area.
figure 17.11 Finding the Volume‐Based Value Area.