The phrase "alert flag" is correct and usable in written English.
It can be used in contexts where you want to indicate a warning or a signal that something requires attention or action.
Example: "The system generated an alert flag to notify the team of the potential security breach."
Alternatives: "warning signal" or "notification alert".
The toolbar (IE, Firefox) stores your payment credentials, payment receipts, and reminds you when bills are coming due through an alert flag and email.
And three surgeons would probably get an alert flag due to their poor results on another procedure, to correct the narrowing of an artery in the neck (carotid endarterectomy).
And while this graph of "Future Expectations minus Present Situation" cannot accurately predict the start of the next recession, this trend suggests it's not too early to raise the Recession Alert flag.
Another three vascular surgeons will receive an alert flag due to their poor results on a different procedure, to correct the narrowing of an artery in the neck (carotid endarterectomy).
Now, Galveston swimmers can look for a new "environmental alert" flag.
Here we demonstrated that a voting scheme based on PCA is effective, when using three sensors, in detecting potential sensor errors and providing an alert flag indicating that the sensor mean may be an inaccurate estimate of the patient's blood glucose level.
It is not clear, however, that the customs security alert, flagging Mr. Tsarnaev's travel to Russia, was ever passed on to the F.B.I.
The alert flagged a problem to Flex 30 minutes before the news hit the mainstream media.
As a penalty, Yelp placed Consumer Alert flags on the offending ventures for three months.
For that was when Marriott International received an incident alert flagging an attempt to access the Starwood guest reservation database.
SOC teams, overwhelmed in handling the deluge of low-impact incidents, fail to respond in time or miss altogether early incident alerts flagging serious attacks.
