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Level 10 · Lesson 8 of 9

Market Structure: BOS and CHoCH

Read swing highs and lows like a pro.

7 min read+10 XPUpdated November 2026

Market structure is the sequence of swing highs and lows. Get this right and trends become obvious.

BOSBOSCHoCHHHHLHHHLHHHLforex20.com
Higher highs (HH), higher lows (HL), breaks of structure and a change of character

Break of structure (BOS)

A candle closes beyond the last swing in the trend's direction: a new higher high in an uptrend. The trend continues.

Change of character (CHoCH)

The first break against the trend: in an uptrend, price closes below the last higher low. Buyers have lost control, at least for now.

Keeping it objective

  • Use candle closes, not wicks.
  • Pick one "structure timeframe" and stick to it.
  • The swing that would prove you wrong is where your stop goes.
Wick says

BOS = "same story, next chapter". CHoCH = "plot twist!"

Key takeaways
  • Uptrend = HH + HL; downtrend = LH + LL.
  • BOS confirms continuation; CHoCH warns of reversal.
  • Structure tells you where to put stops.