Order block: definition, use and limits

Definition

An order block is, in its most common version, the last opposite candle before an impulsive move that broke structure. A bullish order block is the last bearish candle before a strong rally; a bearish order block is the last bullish candle before a strong drop.

The idea is that many orders were placed in that zone, and that price, when it returns, may react.

How to identify it in a repeatable way

• Find an impulsive move with large candles that breaks a swing (BOS or MSS)
• Go back to the opposite candle that originated it
• Mark the zone: from the high to the low of the candle, or from the body, decided in advance
• Check whether the move also left a fair value gap: many consider it a confirmation of strength

How it is used

You wait for price to return to the zone and look for confirmation on the lower timeframe (for example a small MSS) before entering, with the stop beyond the zone. The target is usually the next swing or a liquidity area.

Honest limits

• The definition has many variants (body, wick, single candle or group): two traders draw different zones
• Every chart has dozens of past order blocks, and in hindsight you always find one that 'worked': it is selection bias
• Many zones are crossed with no reaction: a stop loss is indispensable

Exercise

• Write your precise definition of an order block in three lines
• Apply it mechanically to 50 historical cases, without picking the best ones
• Record: reaction, cross-through or partial mitigation. That is the real statistic