Other frequently-used names for key reversal include "one-day reversal" and "reversal day."
How Does a Key Reversal Work?
Depending on which way the stock is trending, a key reversal day occurs when:
In an uptrend -- prices hit a new high and then close near the previous day's lows.
In a downtrend -- prices hit a new low, but close near the previous day's highs
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