Nearly every mistake in structural markup reduces to two: the scale was not stated, and a description of the past was read as a claim about the future. Here is how that looks in practice.
A break with no degree named
"Structure is broken" is an unfinished sentence. At the internal degree breaks happen on every pullback; at the swing degree, rarely. Until it is said which, the statement means nothing.
The same flaw appears across timeframes: "the level broke" without answering "on which chart".
A zone read as a promise
Order blocks, gaps, equal highs — all of them mark places where something already happened. None of them claims price will return, still less that it will then go the way you want.
A simple test: remove the words about the future and see whether any content survives. "A block price will bounce from" → "a block" — content survives. "A zone that is bound to work" → nothing left.
Fitting the scale to the answer
The least visible mistake. If the markup at your chosen scale does not support the idea, it is tempting to move to the neighbouring one — where it will. Anything can be justified that way: there are plenty of scales.
The cure is order of operations: choose the scale from the question you are asking, then mark up. Not the other way round.
Confusing a pierce with a break
A wick beyond a level and a close beyond it are different events. Treat every touch as a break and structure will break several times a day and lose all meaning.
The same distinction separates a liquidity sweep from a break, and most arguments about "false breakouts" rest on it.
Counting touches as a measure of strength
"The level held three times, so it is strong" is reasoning that structural analysis usually inverts: the more prominent the level, the more reason to pierce it. Both versions are interpretations, and neither follows from the markup.
Too many layers at once
Blocks, gaps, inversions, liquidity pools, premium and discount — switched on together, they cover the chart entirely. After that any move is "in a zone", and the markup stops excluding anything.
The opposite is more useful: switch on one layer and see what it says on its own.
Marking up after the fact
The most common mistake of all. On history you can see which level mattered, and the markup comes out beautiful. In real time that data does not exist: a fresh extreme is unconfirmed, and the current move may turn out to be a pullback inside a larger one.
If your markup looks flawless, check whether you are using knowledge that was not available at the time.