Modern materials often tell readers to find the dominant moving line.

That shortcut feels useful because multiple moving lines are overwhelming. But it creates the wrong question.

The question is not: which moving line is strongest?

The question is: which moving lines matter to the target?

This is the same discipline from Act 4 applied to motion. The question chose the target. Motion can modify, support, attack, release, delay, or narrate, but it does not replace the target just because it looks active.

Shortcut Find the loudest movement

Pick the strongest, most active, or most dramatic moving line.

Course method Filter by target relevance

Keep the moving lines that touch the target, support, obstacle, blocker, or timing path.

Why the shortcut fails

Wrong center It replaces the target.

The target was chosen from the question, not from chart drama.

Wrong scale It confuses strength with relevance.

A powerful line may be irrelevant to the matter asked.

Wrong story It overreads background motion.

Some movement belongs to setting, side actors, or timing, not the answer.

A better habit

When several lines move, draw a small relevance map:

Target What line carries the question?

Start from the line selected in Act 4.

Relations What lines help or harm it?

Map support, obstacle, blocker, World, Response, and interval actors.

Movement Which moving lines touch that map?

Those are the moving lines worth reading first.

Common traps

Trap 1 Strongest line wins.

Strength does not equal relevance.

Trap 2 Most transformed line wins.

A dramatic transformation can still be about a side issue.

Trap 3 Moving target bias.

If the target is static, it can still be the target.

What this module establishes

There is no separate “dominant moving line” method in this course.

The target remains the center. Movement is interpreted by relevance.

Source basis: Huang Jin Ce chaotic-movement warning and Bushi Zhengzong's correction toward question-centered target selection. Strong relevant lines matter; strength before relevance is the rejected shortcut.

-> 6.6 Jian Yao: Social Intermediaries Between World and Response