A liquidity void is a stretch of several same-direction candles whose bodies barely overlap and whose total move is at least three ATR. Not a gap between two or three bars, but a whole segment of chart covered in one breath.
How it is found
The count starts at any candle and runs forward while two conditions hold.
The direction does not change. The first candle of the opposite colour ends the run.
Bodies barely overlap. As soon as candles start noticeably covering each other, that is ordinary trading rather than a non-stop move.
When the run ends, the result is checked: there must be several candles, and the total move must be large by the instrument's own standards. Both are required: three wide candles covering no ground do not make a void, and neither does a long but loose stretch.
The zone runs from the first candle's open to the last candle's close.
Why there are not many
Three conditions at once — direction, non-overlapping bodies and a large move — rarely hold together, and that does not make charts empty: the idea itself describes an exceptional move, not an ordinary day. If an instrument has no voids at all, that is how it should be.
As with volume imbalances, zones crossed all the way through do not reach the chart — only fresh and touched ones remain.
How it differs from an FVG
An FVG is a fact about three candles and the space between the wicks of the first and third. It can appear inside a calm move: one fast candle is enough.
A liquidity void is a fact about a whole run: its length, direction and span. Wicks inside it may well overlap — the condition applies to bodies.
Because of that the two often sit together: inside a void there is usually a gap as well. But they are different objects, and neither follows from the other.
What the zone does not mean
A void describes a stretch already travelled: price crossed it fast and barely lingered. The markup makes no claim that price will come back to "fill" it.