A long upper wick on the four-hour GBPUSD is not a personality. It is a stretch of prices that traded and then could not hold. The people who sold up there may still be there. The people who bought may have been forced out. Neither fact guarantees that the next candle goes down.
Classroom language slips into stamps because stamps are easy to photocopy. 'Pin bar at resistance' looks complete in a notebook. It skips the left side of the chart. Was that wick printed into a prior demand zone that is still unfinished, or into fresh air above a weeks-long high? The same shape is two different auctions.
When I mark homework I strike the word reversal unless the student has also written where the opposite auction would be invalidated. A wick at a four-hour supply zone, with the daily still pointed up, is often a pause. A wick that also takes out a prior swing and closes back through it is closer to a change of hands. Even then, the change is a hypothesis until the next session defends it.
Try this on your printed chart: shade the wick, then look left for the last time those prices were accepted for more than two candles. If you cannot find acceptance, you are looking at a probe. Probes get faded more often than they start trends, but 'more often' is not a trade. It is a reason to wait for the following candle’s close.
We still draw the wick. We just refuse to let it name itself.