M7 · Order Blocks · Lesson 127/144
9 min 60 XP
An Order Block (OB) is the LAST candle in the opposite direction before a strong, structure-breaking move. In an uptrend, look just before the big bullish displacement that broke a swing high, the last red candle right before it is the bullish OB. In a downtrend, it is the last green candle before the bearish displacement that broke a swing low. Mark its full range, high to low, that box is the Order Block.
Why that candle, specifically? Large players cannot fill a huge position in one tick. While price was still drifting the "wrong" way, big buy (or sell) orders were quietly being filled inside that candle's range. The moment they had enough size on, the displacement fired off, breaking structure. The OB is the visible footprint of that accumulation, the last price area the big players were active in before launching the move.
Bullish OB
Bearish OB
Not every order placed in that candle got filled before price launched away. Mitigation is price returning to the OB zone to fill those remaining orders, big players topping up the position they started, before the move resumes. This is why an untouched OB acts like a magnet: the first time price returns to it is the highest-probability reaction. Once an OB has been revisited and price still pushes straight through it (a body CLOSE through the zone), treat it as used up, invalidated.
Not every red or green candle is an Order Block
An OB only matters if what follows it is real: a displacement candle that creates a genuine Break of Structure. No displacement, no BOS, no Order Block, just a candle. Context first: find the BOS, THEN look one candle back (sometimes a small group of candles) for the last opposing one. Working backward from the break is what keeps you from drawing boxes everywhere.
An OB alone is a decent zone. An OB that lines up with everything else you have learned is a high-probability trade: price sweeps a nearby liquidity pool (EQH/EQL or a prior high/low), THEN reacts from the OB on the retrace, in the direction of the displacement that created it. Entry near the OB edge, stop beyond the zone (beyond the wick that formed it), target the next structure or liquidity pool. The OB gives you the zone; structure and liquidity tell you whether it is worth trading.