Order Blocks in ICT: Definition, Mean Threshold and Validation
In ICT’s definition, a bullish order block is the last down-close candle before a bullish displacement that breaks structure; a bearish order block is the last up-close candle before a bearish displacement. The block marks where the move started, and price often reacts when it returns there.
Intermediate · 10 min read · Updated
What you will learn
Mark a valid order block from its displacement and decide where to enter and where it is invalidated.
Read first: Displacement and Market Structure Shift (MSS) in ICT
How to mark an order block
- Find a displacement that breaks structure.
- Go back to the last opposite candle before the move: the last down-close candle for a bullish move, the last up-close candle for a bearish one.
- Mark its range. Traders use either the full range (high to low) or the body plus the relevant wick; choose one convention and keep it.
Without the displacement and the break, an opposite candle is just a candle. The move it starts is what gives it meaning.
Mean threshold
ICT calls the midpoint of the order block its mean threshold. A common reading is that a healthy bullish block should not be closed below its mean threshold when price returns to it. Traders differ on whether to measure the midpoint on the body or on the full range, so state your convention in your trading plan.
Hypothetical example · A bullish block
The last down-close candle before a rally opens at 103.20 and has a low of 101.60. The block runs from 101.60 to 103.20 (low to open) and its mean threshold is 102.40. Price later returns to 103.00: it has touched the block. A close below 101.60 would invalidate it.
Order blocks, breakers and mitigation blocks
- A breaker block is an order block that failed: price traded through it with a structure break, and the zone is then read from the other side.
- A mitigation block is a similar failed zone, but formed without a prior liquidity sweep.
- These variants will have their own lessons in this school; for now, recognise that a block is only valid until price closes through it.
Order block versus supply and demand
Supply and demand zones are a broader concept: any base from which price left strongly. The ICT order block is narrower — one specific candle, tied to displacement and a structure break. The narrower definition is easier to test because it leaves less room for interpretation.
Combining blocks with other elements
A block that overlaps a fair value gap and sits in the optimal trade entry zone of the leg is a stronger area than a block in isolation. The free OTE and Unicorn indicators look for exactly these overlaps with fixed rules.
A step-by-step plan for an order block retest
- Context: the higher-timeframe bias is bullish and the block formed after a sweep of sell-side liquidity.
- Zone: mark the block (here 101.60 to 103.20) and its mean threshold (102.40).
- Entry: choose in advance between the top of the block (more fills, wider stop) and the mean threshold (fewer fills, tighter stop).
- Stop: below the block low, with a margin of a few ticks, for example 101.40.
- Target: the swing high made after the displacement, then the next buy-side liquidity.
- Size: the number of contracts follows from the distance between entry and stop, not the other way round.
Hypothetical example · Reward to risk
Entry at the mean threshold, 102.40; stop at 101.40, a risk of 1.00 point; first target at the swing high made after the displacement, 110.20, a potential gain of 7.80 points. The ratio is 7.8 to 1. Entering at the top of the block, 103.20, gives a risk of 1.80 points and a ratio of about 3.9 to 1, but price reaches that level more often. Neither choice is better in general: test both.
Common mistakes
- Marking the last opposite candle before a small move without a structure break.
- Choosing a block far back in time that price has already revisited several times.
- Placing the stop inside the block: the invalidation is beyond it.
Practice exercise
Find three bullish and three bearish order blocks on a 15-minute chart, each followed by a structure break. Record whether price returned to them, whether it closed beyond the mean threshold, and what happened next. Compare full-range and body-based blocks on the same examples.
Check your understanding
1. What is a bullish order block in ICT?
- The first up candle of the day
- The last down-close candle before a bullish displacement that breaks structure
- Any support level
Show the answer
Answer: The last down-close candle before a bullish displacement that breaks structure. It is tied to the displacement and the structure break that follow it.
2. What is the mean threshold?
- The midpoint of the order block
- The day’s average price
- The stop-loss distance
Show the answer
Answer: The midpoint of the order block. ICT calls the 50% level of the block its mean threshold.
3. When is a bullish order block invalidated?
- When price touches it
- When price closes below it
- At the end of the session
Show the answer
Answer: When price closes below it. A close through the block means it failed.
Practise with the free tools
Frequently asked questions
Should I use the body or the wicks for an order block?
Both conventions exist. Pick one, write it in your plan and test it, because it changes entries and stops.
Are order blocks the same as supply and demand zones?
They are related, but the ICT order block is a single candle linked to displacement and a structure break, which makes it narrower and easier to test.
How long does an order block stay valid?
Until price closes through it. Blocks that have been revisited several times are weaker.
Related lessons
References and further reading
- The Inner Circle Trader — official YouTube channel — Michael J. Huddleston
- E-mini Nasdaq-100 futures contract specifications — CME Group
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