Gap - Up/Down: An up gap forms when a security opens above the previous period's high, remains above the previous high for the entire period and closes above it. Up gaps can form on daily, weekly or monthly charts and are generally considered bullish. A down gap forms when a security opens below the previous period's low, remains below the previous low for the entire period and closes below it. Down gaps can form on daily, weekly or monthly charts and are generally considered bearish.
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