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Order blocks: where strong moves start

An order block is the last opposite candle before a strong move that breaks structure. The idea behind it: large participants could not fill all their orders at once, and price often returns to that area before continuing. Not every opposite candle is an order block; the move that follows decides.

Updated · 3 min read

1. Definition

Bullish order block: the last down candle before a strong move up that breaks structure; price later returns to it (mitigation)Bullish order blockprevious highmean threshold 50%BOSmitigation
The last bearish candle before the strong rally is the bullish order block. The rally breaks the previous high (BOS) and leaves a gap. When price returns to the block, buyers step in again.
Bullish order block
The last down (bearish) candle before a strong up move that breaks a swing high. The zone is that candle's range, often measured from its high (or open) to its low.
Bearish order block
The last up (bullish) candle before a strong down move that breaks a swing low.
Mitigation
The first return of price into the block. Many traders expect the reaction here.
Mean threshold
The 50% level of the order block. A close beyond it weakens the block; a close beyond the whole block invalidates it.

2. What makes an order block valid

Most down candles before an up move are not order blocks. Check these points:

  1. Displacement: the move away from the block is strong, with large bodies, often leaving a fair value gap.
  2. Break of structure: the move breaks a meaningful swing high (for a bullish block) or low (for a bearish one).
  3. Liquidity taken first: the best blocks often form right after a sweep of a previous low or high (see liquidity).
  4. Unmitigated: price has not yet returned to it. Each return uses up orders.
  5. Location and timeframe: bullish blocks in the lower half (discount) of the range, in line with the higher timeframe trend. 4-hour and 1-hour blocks matter more than 1-minute ones.

3. Breaker blocks: when an order block fails

Breaker block: a bullish order block that fails (price closes below it) often turns into resistanceFailed OB → breakerclose below the OBretest from below
Price rallies from a bullish order block but then closes below it. The failed block becomes a breaker: on the retest from below, it often acts as resistance.

A close through an order block is a clear signal that the idea was wrong. The failed zone often switches role, much like old support turning into resistance in price action. This is called a breaker block.

4. A step-by-step order block plan

  1. Higher timeframe bias on the daily or 4-hour chart.
  2. Find the block that created the latest break of structure in that direction.
  3. Wait for mitigation: a limit order at the block's edge or its mean threshold, or wait for a lower-timeframe change of character inside the block for confirmation.
  4. Stop beyond the block (below the low of a bullish block), plus a small buffer for spread and noise.
  5. Target the liquidity that the move is likely to reach: the recent high, equal highs, or the previous day's high.
  6. Size the trade from the stop with the position size calculator, and check the reward-to-risk in the profit calculator.

5. Order blocks vs supply and demand zones

Both mark areas where a strong move started. Supply and demand zones usually include the whole base (several candles); an order block narrows it to the last opposite candle, which gives a tighter stop but is touched less often. Neither is magic: they are areas where the probability of a reaction is higher when structure, liquidity and the higher timeframe agree.

6. Common mistakes

  • Calling every last opposite candle an order block, without displacement or a break of structure.
  • Trading blocks against the higher timeframe trend.
  • Using blocks that have already been tested several times.
  • Moving the stop when price trades into the block. A close beyond the block means the idea failed.
  • Ignoring news: high-impact releases can run through any zone (see fundamental analysis).

Frequently asked questions

What is an order block in forex?

The last opposite-colour candle before a strong move that breaks structure: the last down candle before a strong rally (bullish block) or the last up candle before a strong drop (bearish block). Price often returns to it before continuing.

How do I know an order block is valid?

Look for displacement away from it, a break of structure, ideally a liquidity sweep just before it, and no earlier return into the block. Higher-timeframe blocks in line with the trend are more reliable.

Where should the stop loss go?

Beyond the order block: below the low of a bullish block or above the high of a bearish block, with a small buffer for the spread. A close beyond the block invalidates it.

What is a breaker block?

An order block that failed (price closed through it). The failed zone often flips role, acting as resistance if it was a bullish block, or support if it was bearish.

Are order blocks the same as supply and demand?

They are related. Supply and demand zones usually cover the whole base before a move; an order block focuses on the last opposite candle, giving a narrower zone and a tighter stop.

Education only, not investment advice. Trading forex, gold and CFDs carries a high risk of losing money.

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