The short answer
Liquidity void and imbalance are the two ICT terms for the patches of inefficiency a chart leaves behind whenever price moves too fast for two-sided trade, and the difference between them, the fair value gap, and the balanced price range is the single most confused set of ideas in Smart Money Concepts. Get the four straight and most of the method snaps into place.
An imbalance is the umbrella term for any one-sided move where buyers or sellers dominated and price departed from fair value. A fair value gap is one specific kind of imbalance, the precise three-candle gap, and it already has its own fair value gap page, so I cover it here only to draw the line.
A liquidity void is the broader zone, the full leg of one-sided displacement that often contains several fair value gaps inside it. The balanced price range, abbreviated BPR, is the opposite, the overlap of two opposing gaps where buying and selling reached equilibrium.
I treat these four as a family, and most of the skill is keeping straight which one you are looking at, because the entry logic for a void is not the entry logic for a BPR. If the wider method is new, the Smart Money Concepts hub shows how this sits inside the framework.
What imbalance means in ICT
ICT traders use the word imbalance for any stretch of price action where one side of the market overwhelmed the other and price ran without two-sided trade. It is the broad category, and the fair value gap, the liquidity void, and the displacement that creates them are all specific kinds of imbalance.
The word gets overloaded, so I will pin it down. On this page imbalance means a price-structure imbalance, a patch of one-sided delivery on the chart, not an order-book imbalance, which is a microstructure measurement of resting bid and ask volume.
I reach for the umbrella term when I want to describe the whole phenomenon and the specific term when I want to act on it. An imbalance tells me price was inefficient here, while a fair value gap tells me exactly which three candles to mark.
The fair value gap, in one paragraph
A fair value gap is the smallest unit of imbalance, the three-candle formation where the wicks of the first and third candles do not overlap and a gap is left behind. The full mechanics, the bullish and bearish forms, and the unsourced fill-rate claims live on the fair value gap page, and I will not repeat them here.
The only thing this page needs from the fair value gap is its size. A single gap is narrow, and most one-sided moves leave more than one of them stacked along the leg.
The liquidity void: the full displacement leg
A liquidity void is the ICT term for the entire zone of inefficiency a strong move leaves behind, and it is broader than any single fair value gap inside it. Where a fair value gap measures three candles, a liquidity void spans the whole displacement leg and often contains two or three gaps stacked together.
I mark a void from the start of the displacement to the point where two-sided trade resumed, which is usually the full body of the impulsive move. The void is the region price tore through because there were no resting orders to slow it, and that region is what the market is said to rebalance when it returns.
The distinction that matters for trading is that a void is a zone, not a line. Entering at the nearest edge of a void is a different decision from entering at the far edge, and the void's depth decides how much room price has to travel through it on the retrace.
The balanced price range (BPR)
The balanced price range, abbreviated BPR, is the opposite of an imbalance, the zone where two opposing fair value gaps overlap at the same price and price action reaches equilibrium. A bullish gap and a bearish gap sitting at the same level stack two zones of interest into one, which ICT traders read as a high-concentration area.
I treat the BPR as a dealable range rather than a gap to fill, because the overlap means buyers and sellers already agreed on that price. Price tends to react sharply when it returns to a BPR, since two independent inefficiencies resolved at the same level.
The BPR is also where ICT traders locate the premium and discount halves of a dealing range, which connects it to the premium and discount page. A balanced zone is the equilibrium, and the imbalance above or below it is where price is said to be unfair.
The four zones side by side
The four terms collapse into one mess on most pages, so I keep them in a single table and refer back to it. The row that matters is the size, because size is what separates a fair value gap from a liquidity void from a balanced range.
| Zone | What it is | Size | What it tells you |
|---|---|---|---|
| Fair value gap | A three-candle gap with no wick overlap | Smallest | A specific inefficiency to trade |
| Liquidity void | The full one-sided displacement leg | Large | A zone price may rebalance |
| Imbalance | The umbrella term for any one-sided move | Varies | Price was inefficient here |
| Balanced price range | The overlap of two opposing gaps | A bracket | An equilibrium price reacts at |
I read the table from the smallest unit to the largest when I scan a chart. A fair value gap is a three-candle inefficiency, a liquidity void is the whole leg, and a balanced price range is the equilibrium zone where two of them overlapped.
The causal chain: displacement, gap, void
The four zones are not independent, they form a causal chain, and understanding the chain is what stops you treating them as unrelated patterns. The chain runs from displacement to fair value gap to liquidity void, and the displacement page owns the first link.
A displacement, the strong impulsive move, is the cause. The displacement moves price so fast that it leaves a fair value gap behind, and the full run of displacement leaves a liquidity void that contains one or more of those gaps.
I trace the chain backwards when I trade. I spot a void, confirm it contains real fair value gaps, and check that those gaps sit at the end of a genuine displacement, because a void with no displacement behind it is just a quiet patch of chart mislabelled as inefficiency.
Why voids form: the order-flow mechanism
The reason a void forms at all is mechanical, and it is the part of the concept I find most useful to ground in real research. Price gaps through a region when the order flow is one-sided and there are no resting orders on the other side to absorb it, which is a foundation of market microstructure.
The canonical reference for how order flow and liquidity produce prices is Maureen O'Hara's work on market microstructure theory, which frames price formation as the outcome of traders arriving with orders under asymmetric conditions. A void is the chart-level footprint of exactly that, a moment when one side arrived in force and the other did not.
Carol Osler's research at the Federal Reserve Bank of New York adds the mechanism for why the move runs so hard, which is that stop-loss orders cluster at the levels price breaks through and cascade when triggered. The void is the gap the cascade leaves behind, and the rebalance is price coming back to fill where the cascade skipped.
Why liquidity voids do not always fill
This is the question every trader asks and most pages answer with a confident percentage I cannot source. The honest answer is that voids often rebalance but they do not always fill, and no peer-reviewed study gives a fill rate for ICT liquidity voids.
I treat the fill as likely, not guaranteed. A void on a higher timeframe in the direction of the prevailing trend is more likely to be revisited than a void on a five-minute chart in the middle of a range, because the higher-timeframe inefficiency is the one the market has a real reason to correct.
The danger is treating the fill as a certainty, which is how traders front-run a void that price never returns to. I mark the void and wait for price to show me it is rebalancing before I act on it, rather than assuming the fill is owed to me.
How to trade liquidity voids and imbalances
The trade is a retrace entry, and the logic is the same as for a fair value gap, only applied to a wider zone. Price moves away, leaves the void, and the entry comes when price returns to rebalance the inefficiency.
I enter on the near edge of the void when price retraces into it, ideally confirmed by a lower-timeframe shift in my favour, and I place the stop beyond the void rather than at its edge. The target is the next pool of opposing liquidity, which is where the rebalance is said to complete.
The wider the void, the more flexible the entry, because a large zone gives price room to travel through it before reversing. I narrow my focus to the fair value gaps inside the void when I need a precise level, since the gaps are the actionable points inside the broader zone.
Imbalance and the order block
An imbalance rarely appears on its own, and ICT traders read the order block as the cause that sits beneath it. The order block is the last opposite candle before the displacement, and the imbalance is the inefficiency that displacement leaves behind, so the two are cause and effect.
I pair the two when I trade, because an imbalance that sits on top of an unmitigated order block is a stronger setup than an imbalance floating alone. The block gives the imbalance a foundation, and the imbalance gives the block a reason to hold.
The full procedure for trading that pairing is on the order block trading strategy page, which breaks the entry into a filter and a set of rules. This page is about the imbalance itself, not the whole trade.
A worked example: trading a void retrace on a four-hour chart
The retrace entry is clearest with a real shape, so here is a bullish liquidity void long, step by step. The numbers are illustrative, but the ratios are how I actually manage the trade.
Suppose the four-hour chart breaks structure to the upside off a strong displacement candle, and the full leg from 1.0820 to 1.0895 leaves a liquidity void with two fair value gaps stacked inside it. The void passes the test, because it sits behind a genuine displacement and contains real gaps, and the next sell-side liquidity rests below the equal lows at 1.0810.
Price runs up to 1.0920, then retraces into the void and taps the near edge at 1.0890. On the fifteen-minute chart price prints a shift up and reclaims a minor lower high, which is my confirmation, and I enter long at 1.0892 with a stop at 1.0815, just beyond the void's low.
The risk is the distance to the stop, which is one unit, and the target at the next buy-side liquidity above the 1.0920 high offers better than three to one. I narrow the entry to the specific fair value gap inside the void when I want a tighter level, since the gap is the actionable point within the wider zone.
Common mistakes
The losses on this concept come from the same short list of errors, and most of them are labelling mistakes rather than analysis mistakes. These four are the ones I see most.
Confusing a fair value gap with a liquidity void is the first, and it leads to entering at the wrong scale. A gap is a three-candle level and a void is a whole leg, and trading them with the same entry logic is how you get stopped early or enter late.
Treating every patch of one-sided movement as an imbalance is the second. A quiet drift is not an imbalance, because an imbalance requires displacement, and labelling ordinary movement as inefficiency fills your chart with zones that mean nothing.
Assuming every void fills is the third, and it is the error that pays the most tuition. Voids often rebalance, but the ones that never return are real, and trading them as guaranteed is how you hold a position waiting for a fill that never comes.
Ignoring the order block beneath the imbalance is the fourth. An imbalance with no structural cause is a weaker setup, and pairing the two is where most of the edge actually lives.
