SocialForex
Intermediate

Price Action Break of Structure (BOS)

Learn to identify and trade the Break of Structure (BOS), a signal of trend strength or reversal.

Mark · Trader & Founder, Social Forex

Price Action Break of Structure (BOS)

Definition of Break of Structure (BOS)

Break of Structure (BOS) is a price signal where the asset breaks a significant previous high or low, indicating strong trend continuation or reversal. In an uptrend, a break above a swing high is a bullish BOS; in a downtrend, a break below a swing low is a bearish BOS. BOS is often accompanied by high volume and long-bodied candles.

How to Identify BOS

  • Identify market structure: Mark swing highs and swing lows on your timeframe using trendlines or zones.
  • Wait for breakout: Price must close clearly above the swing high (bullish BOS) or below the swing low (bearish BOS) with a strong candle.
  • Check volume: A spike in volume during breakout adds confirmation.

    • Example of bullish BOS in an uptrend: price breaks above the previous high, often with a strong bullish candle.

    HH1BOSHH1HL1HH2HL2Uptrend: BOS confirms continuation

    Example of bearish BOS in a downtrend: price breaks below the previous low, often with a large bearish candle.

    Price Action — reading candlestick patterns in context

    How to Trade BOS

  • Entry: Enter immediately after the breakout candle closes, or wait for a retest of the broken level.
  • Stop Loss: Place below the old swing high (for long) or above the old swing low (for short).
  • Take Profit: Target the next swing high/low or use a risk-to-reward ratio of 1:2.

    • Real Example

    EUR/USD on H4: price made a low at 1.0800, then a high at 1.0900. It dipped to 1.0850 and then broke above 1.0900. That is a bullish BOS. You could buy with stop below 1.0800, target 1.1000.

    Common Mistakes

  • Confusing BOS with pullback: A pullback is a temporary retracement within a trend, not a structure break. Always wait for a clear close.
  • Ignoring volume: BOS without volume increase is prone to fakeouts.
  • Trading against the BOS: Do not sell after a clear bullish BOS, and vice versa.

    • Content is for reference only, not investment advice. Forex trading carries high risk.

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