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Break of Structure (BOS)

A break of structure happens when price closes beyond the last swing high in an uptrend, or the last swing low in a downtrend. It is the market confirming that the current direction is still in control.

Market StructureIntermediate10 min read30 Oct 2026

Sample content, pending review by Bangrazka

Learning objectives

  • Mark swing highs and lows consistently on any timeframe
  • Separate a confirmed break from a wick that only pokes through
  • Use a BOS to define where a pullback entry may form

Swings come first

Structure is built from swings. A swing high is a candle high with lower highs on both sides; a swing low is the mirror image. Before you can see a break, you need a clear map of the swings that matter on the timeframe you trade.

Mark only the swings that caused a visible change in direction. If you mark every small wiggle, every candle becomes a break and the concept stops meaning anything.

Close, not touch

A BOS is confirmed when a candle body closes beyond the swing. A wick through the level that closes back inside is a different event: it is often a liquidity grab, covered in its own lesson.

Waiting for the close costs a little price but removes many false signals, especially around news releases when wicks are long.

What a BOS tells you

In an uptrend, each BOS creates a new higher high. The swing low that produced that move becomes the level the trend must hold. As long as it holds, pullbacks are opportunities to look for continuation, not reasons to call a reversal.

Chart example

Swing highBOS
Illustrative diagram, not real market data.

Practical example

On a one-hour gold chart, price forms a swing high, pulls back to a higher low, then closes a full candle above the swing high. That close is the BOS. The higher low below it now marks the line in the sand: a close below it would weaken the bullish structure and is where a change of character would begin.

Video lesson

The video for this lesson will be added here.

Common mistakes

  • Marking every minor swing, so that every candle looks like a break
  • Treating a wick above the high as confirmation
  • Trading the break candle itself instead of waiting for a pullback

Key takeaways

  • A BOS is a close beyond a meaningful swing
  • It confirms the existing trend, it does not start a new one
  • The swing that produced the break is the level the trend must defend