After-Hours Stock Gainers and Losers Screener
Screen after-hours stock moves with ChartsWatcher. Measure dollar or percentage change from today’s regular close and add postmarket volume.
Understand the metric
What is Change from close (post market)?
The postmarket change-from-close filter compares the current after-hours price with today’s regular-session close. Its dollar and percentage options isolate the move after that closing reference, rather than the full move since yesterday. The documented behavior is specific to postmarket, making this a dedicated extended-hours measurement rather than a general all-session daily-change filter.
An illustrative example
Change from close (post market) in practice
If a stock closes the regular session at $30 and trades at $31.50 afterward, its postmarket change is $1.50, or 5%. A prior-day close of $28 does not change this calculation: the reference for this filter is today’s regular-session close.
Make it part of your workflow
A more deliberate stock screen.
Use ChartsWatcher to assemble an after-hours movers view with this change filter and postmarket volume. Add a recent-news condition to narrow the investigation, then examine the newsfeed and chart together to distinguish the timing of the reported event from the subsequent price movement.
ChartsWatcher lets you combine this filter with other criteria in a toplist and rank the results by the columns you care about. Keep the shortlist beside charts, stock news, and watchlists in your own layout.
Explore the screener / toplistBefore you build
A little more detail.
How do I add Change from close (post market) in ChartsWatcher?
Open or create a toplist and add Change from close (post market) to its filter configuration. Choose the available options and the bounds that fit your screen. Combine it with other metrics to narrow the results. Filters can also refine which stocks qualify for an alert.
What should I check when interpreting this filter?
This measurement is intended for postmarket. Extended-hours moves can occur with limited participation, so a large percentage alone does not describe trading activity.
From an idea to your own scan.
Use Change from close (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.