Bull Flag
A sharp advance followed by a short, shallow drift against it inside two parallel lines. It completes on a close above the upper line.
A pause rather than a reversal — the drift is read as profit-taking rather than as a change of mind. The distinction that matters to a detector is depth: a pullback that retraces most of the advance is not a flag, it is a failed move, and the two look identical for the first few bars.