Volume imbalance
A volume imbalance is a gap between the bodies of two neighbouring candles, where their wicks still overlap.
Definition
A volume imbalance is a gap between the bodies of two neighbouring candles, where their wicks still overlap.
It differs from a fair value gap in what it compares. A fair value gap compares the wicks of candles 1 and 3. A volume imbalance compares where one candle closed and the next opened.
Because it uses bodies, a volume imbalance can exist where there is no fair value gap, and the other way round.
The name is an educator's term. It does not mean that trading volume was measured.