Single prints
Trader's Glossary · Profile and auction

Definition. An area in the time profile (TPO) where only one letter appears at successive price levels, meaning price passed through it quickly, in a single period.
How it works
Single prints form during fast moves. They mark an area where the market didn't trade in balance and one side clearly dominated.
Example
After a data release, price moves several dozen points within one 30-minute period. A band of single letters remains in the profile.
What to watch out for
A single-print area is sometimes tested later, but it doesn't have to be. It's information about the character of the move, not a signal.

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See also
Market Profile (TPO), HVN and LVN, Poor high and poor low.
More in Hetman Capital Club
You'll find the full explanation with graphics, examples and exercises in the 📖 Order flow encyclopedia space, and its use in the live market in the 🔴 Live Room. Both are available to Club members (in Polish).
Educational content, not investment advice.