Smart money concepts

The order block,defined precisely.

An order block is the last opposing candle before a strong move that breaks market structure: the final down-close candle before a sharp rally is a bullish order block, the final up-close candle before a sharp drop a bearish one. Traders mark it as a zone where price may react. It is a location, not a prediction.

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What an order block is

In smart money concepts an order block is a candle, or a short cluster of candles, where price is assumed to have been accumulated before a decisive move. The practical definition is mechanical: find a strong move that breaks structure, step back to the last candle that closed the other way, and mark it.

The idea behind the name is that large participants cannot fill a big order in one print, so the last opposing candle marks where they were building a position - and that they may defend it if price returns. That explanation is a story about who traded, which a price chart cannot confirm. The mechanical definition is what traders can actually apply.

A bullish order block: the last down-close candle before a displacement that closed above the prior swing high. The shaded zone is its open-to-low range. Illustrative schematic, not market data: no instrument, price or date is shown.

What makes a block worth marking

Almost every swing has a last opposing candle, so traders filter. The filters most often applied are these:

The move away is fast and large-bodied - displacement - rather than a slow grind.
The move breaks a prior swing high or low, a break of structure. A block that breaks nothing is usually ignored.
The move leaves a fair value gap behind it, taken as further evidence of an imbalance.
The block has not yet been revisited. Once price has returned to it, many traders consider it used, or 'mitigated'.
It sits on the right side of the range: bullish blocks in the lower half of the current dealing range (discount), bearish ones in the upper half (premium).

Body, wick or mean threshold

There is no single convention for the zone itself. Some traders use the full candle from high to low. Others use open to low for a bullish block and open to high for a bearish one, treating the open as the key level. Many also mark the block's midpoint, often called the mean threshold, and treat a close beyond it as a sign the block is failing.

These choices matter because they move the stop. Pick one convention, write it down, and backtest that - not a mixture chosen after the fact.

When an order block fails

Order blocks fail constantly. When price trades straight through one and the sequence around it included a sweep of liquidity, the failed block is reclassified as a breaker block. Without the sweep, it may be called a mitigation block. Either way, the failure is information: the zone did not behave as marked.

Step by step

How to identify it

Start from the move, not the candle. The block is defined by what came after it.

Find a strong, fast move - several large-bodied candles in one direction with little overlap.
Check that the move broke a prior swing high (for a bullish block) or swing low (for a bearish one).
Step back to the last candle before the move that closed in the opposite direction. That is the order block.
Mark the zone by your chosen convention, and mark the midpoint if you use it.
Check context: is the block in discount for a long or premium for a short, and does the higher timeframe agree?
Record whether price has already returned to it. An untested block and a tested one are not the same setup.

Worked example

The concept,walked through

A bullish order block, described

Illustrative round numbers, described in words. Not a real instrument, date or price.

1. The declinePrice drifts down from 120 to 104, with a minor swing high at 112 along the way.
2. The last down candleThe final down-close candle opens at 106 and trades to a low of 102.
3. The displacementThe next two candles rise from 103 to 116 with little overlap, closing above the 112 swing high - a break of structure.
4. The zoneUsing the open-to-low convention, the bullish order block is 102 to 106, with a mean threshold at 104.
5. The returnPrice later drops back to 105. A trader using this model might look for a long entry signal here, with a stop below 102.

If price closes below 102, the block has failed and the setup is void. If it rises, that does not validate the concept - one reaction is not evidence. The example shows how the zone is drawn, not whether it holds.

Common mistakes

Where tradersgo wrong

Marking any opposing candle

Without a strong move and a break of structure after it, the candle is just a candle. Unfiltered order blocks are everywhere.

Trading a block already revisited

Many traders treat a block as spent once price returns. Re-using it without saying so in your rules muddies any record you keep.

Ignoring the higher timeframe

A bullish block on a five-minute chart inside a strong daily downtrend is a counter-trend trade, whatever it looks like up close.

Moving the zone after the fact

Switching between wick, body and midpoint depending on where price turned makes every block look like it worked.

Limitations

What it cannottell you

No chart concept predicts price. These are the limits worth keeping in view.

Order blocks are drawn in hindsight, and two traders will often mark different candles on the same chart.
The claim that they show institutional orders cannot be verified from price data alone. Treat it as a way of describing the chart, not a fact about who traded.
No independent study has shown order blocks forecast price. A zone that 'worked' in a backtest may have done so by chance or by selective marking.
A block defines where you might act; it says nothing about how far price will go if it does react.

In an evaluation

Using it on asimulated account

An order block gives a natural stop - beyond the far side of the zone - which makes position sizing straightforward to calculate. Use the position size calculator with that distance, and keep each trade's risk well inside the daily loss limit, which is 3% on Instant and 5% on 1 Step and 2 Step.

Zones on several timeframes can overlap into many small positions at once. Correlated positions share one risk budget: three longs on three dollar pairs off three order blocks are closer to one large trade than three small ones.

Trading rule

What is the daily loss limit?

The limit a run of failed blocks is measured against.

Trading rule

Is there a maximum lot size?

How lot size and margin work on a simulated account, for sizing from the zone's stop.

Trading rule

What is maximum drawdown?

The overall floor, which counts floating losses on open positions.

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