Did some analysis for GLD over 2000 days. If Open to Close was -2% or more, then the average Open to Low the next day was -1.49% (52 occurances). The breakdown is below. The Open to Close next day did not look as good. It looks like Yesterday's loss was the most in 400 days.
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Flip that coin.
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My chart has Daily Elders (Close, High, and Low), MA-2, CCI, and ATR for each stock; all color coded.