First, the price rises rapidly, driven by the excess of demand. Then, the market finds a supply cluster and reverses quickly, forming a long upper wick.
The low of this candle will signify a concentration of supply.
Example
Examine an example of a bearish rejection on GBPUSD.$BNB
First, the price is falling sharply because of the excess of supply.
Then, the market finds a demand cluster and reverses quickly, forming a long lower wick. The low of this candle will signify a concentration of demand.
Example
Below is an example of the occurrence of a bullish rejection on GBPUSD forex pair.