If it occurs at other times, it's a red flag warning that the system has been compromised.

如果它出现在其他时候，则就是系统受到危害的危险警报。

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The National Weather Service said a red flag warning was in effect until Friday evening.

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Generally, a bearish momentum divergence is a red flag warning signal, which often presages a pullback or correction.

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The National Weather Service in San Diego said a red flag warning was in effect until Friday evening.

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