In general sense Phase A, will provide sign that the market is shifting/transitioning from trending to ranging.
Phase E, occurs when Price is indeed trending outside the range. The harmonic relationship between effort and result (volume and price action) is expected.
Phase E, will provide the opportunities to enter in the direction of the main trend. (As long as we see that trend might be losing its strength for example, like appearance of preliminary stop)
In distribution, when a real breakout happens, the market comes back to retest the range (of its breakout), which is called the confirmation point. This point is also called the Last Point of Supply.
Important:
It's important that you have 7 logical event corresponding marked phases, clear in your mind before moving towards the study of structure.
You should be able to tell what each of the logical event represent and which phases they belong.
Otherwise, the study of structure will become very confusing.