The first break against the trend — the earliest structural hint that control may be changing hands. This free lesson covers: What a change of character is, BOS and CHOCH, side by side, Which is which?, Name it, What it is not, How much does it prove?, What confirmation looks like, Reading the sequence, Where this sits in the method, Put it together.
Market Structure · Learn · Step 1 of 10
A change of character — CHOCH — is the first time price breaks a swing point *against* the prevailing trend.
In an uptrend of higher highs and higher lows, it is the moment a higher low finally fails: price closes below the last swing low. The pattern that had been repeating stopped repeating.
Going deeper
CHOCH is one of the most misused terms in retail trading. The concept is narrow — the first structural break against the prevailing trend — but it is widely presented as a reversal signal, which it is not.
The distinction matters commercially as well as technically: alerts and indicators sold on "CHOCH detection" are flagging a condition that resolves back into the original trend a great deal of the time.
No. It is the first evidence that the existing structure has been interrupted. Many resolve back into the original trend without reversing.
The vocabulary grew informally through trading communities rather than from a standard reference, so usage varies. What matters is being consistent within your own method.