Premarket and After-Hours High of Day Stock Alerts
Monitor new daily stock highs and lows including premarket and after-hours trading. ChartsWatcher keeps extended-session range changes in view.
Understand the trigger
What is High/Low of the day (pre/post-market)?
This High/Low of the Day variant includes extended hours when monitoring fresh daily extremes. It offers High and Low options and runs during premarket, the regular market, and postmarket. That wider session coverage is the central distinction from the regular-session version. It helps you recognize a new daily range extreme when it happens outside the main trading session instead of waiting for the opening bell.
An illustrative example
High/Low of the day (pre/post-market) in practice
For example, a stock might set a daily high in premarket trading following a company announcement. A subsequent premarket price above that high illustrates an event covered by this variant. The same tool also covers the regular session and postmarket rather than being limited to premarket alone.
Make it part of your workflow
Catch the event. Keep the context.
Use this alert in ChartsWatcher when your market review includes activity before the open or after the close. Check whether the event occurred in extended hours, compare the range on the chart, and inspect session volume or incoming news. Keeping the session visible makes the resulting highs and lows easier to interpret.
ChartsWatcher brings your chosen alert types and filters into the same alert window. Add the data columns you want to see, then use the connected chart and news tools to explore a matching symbol.
Explore the alert windowBefore you build
A little more detail.
How do I add High/Low of the day (pre/post-market) in ChartsWatcher?
Open or create an alert window and choose High/Low of the day (pre/post-market) in its configuration. Select the available options that match your setup, then add filters to define which stocks can trigger it. Review matching alerts alongside a chart and the stock’s news.
What should I check before using this alert?
Extended-hours highs and lows can reflect thinner participation and wider spreads. They should not be assumed to have formed under the same conditions as regular-session extremes.
From an idea to your own scan.
Use High/Low of the day (pre/post-market) with the other conditions that define your setup. Keep matching stocks, charts, and news together, with a configuration you can refine as you go.