GUR
▼ Bearish
Streaming Alert (Scanner)
Gap Up Reversal Alert (GUR)
By Daniel Mirkin, CEO, Trade Ideas. Updated October 2026.
Find gap up stocks that reverse and cross yesterday's close in real time with Trade Ideas Streaming Alerts (Scanner). A gap up reversal is when a stock gaps up at the open, then reverses and crosses yesterday's close for the first time since the open, filling the gap.
Stocks moving off the open.
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Streaming Alerts show a gap up reversal the moment price crosses back through yesterday's close.
How Trade Ideas finds it: by default, the gap up reversal alert will appear when a stock price crosses yesterday's closing price from above for the first time since today's open. See Trade Ideas plans and pricing to run it live.
What is a gap up reversal?
A gap up reversal starts with a stock opening above yesterday's close. Then, instead of running, it slides back down and trades below that close. The gap has been fully filled and the stock is now down on the day.
Trade Ideas fires the alert the first time price crosses yesterday's close after the open, and it tells you how big the gap was.
Parts of a gap up reversal
The gap up
The stock opens higher than it closed yesterday.
The fade
Early buyers do not hold it. Price drifts back toward the prior close.
Cross of the close
Price trades through yesterday's close. This is when the alert fires.
How traders use it
Step 1: Let the Trade Ideas alert find it
Turn on the Gap Up Reversal alert (GUR). Add a minimum gap size filter so small, meaningless gaps stay off your screen. See it live in the Web Dashboard.
Step 2: Wait for the trigger
Trader tip
The alert is the trigger: the first trade below yesterday's close. Some traders give it a few minutes to see whether the close level gets reclaimed.
Step 3: Entry
Short sellers often enter right after the cross. Others wait for a bounce back up to the old close that fails.
Step 4: Exit
A stop just above yesterday's close, or above the morning high, is common. Treat that as how traders usually do it, not a recommendation.
Tips
- Bigger gaps that fully reverse tend to get more attention.
- Check the news. A gap on real news reverses less often.
- Watch the volume on the cross.
- The opposite case is the Gap Down Reversal (GDR).
Past results, including backtests, are not indicative of future results.
How the Gap Up Reversal alert works
Key point
A gap is when a stock changes price between yesterday's close and today's open. A gap reversal is when a stock moves in one direction between yesterday's close and today's open, then moves in the other direction after today's open. A gap reversal alert occurs when a stock price crosses yesterday's closing price for the first time since today's open.
Key point
This alert reports the size of the gap. The gap is defined as today's opening price minus yesterday's closing price. It is called a "gap up" if the stock price moves up between the close and the open. If the close and the open have the same price, there is no gap, and this alert will not occur.
Note: This is a very common definition of "gap", but this is not the only definition of gap. This alert also reports the continuation. If the stock gaps in one direction, then immediately starts trading in the other direction, there is no continuation. However, if the stock gaps in one direction, then continues to trade in that direction before eventually reversing, that is called a continuation.
Key point
The size of the continuation is the amount that the stock moved in the direction of the gap, after the open, but before the reversal. This alert will occur the instant a stock price crosses yesterday's close, even by a fraction of a penny. Normally this alert will not occur more than once per day.
It is possible to see this more often if the exchange reports a correction to a bad print.
Default settings
By default, the gap up reversal alert will appear when a stock price crosses yesterday's closing price from above for the first time since today's open.
Custom settings
Settings
For 'Gap Up Reversal' alerts, you have the option to use an alert specific filter. This filter is located immediately to the right of the corresponding alert and is always optional. You can decide to leave it blank if you want to receive more alerts, or you can fill it in to restrict the number of alerts you receive. This filter allows you to specify the quality of the alert. When you set a higher number for this filter, you are telling the alerts server to display only alerts that meet a higher quality standard, resulting in fewer alerts being shown.
When setting an alert for 'Gap Up Reversal', the user can filter gap reversals based on the maximum distance that the price moved away from the close. This value is called the total retracement. The user can specify a minimum value for the total retracement and will not see alerts with a smaller total retracement. For example, assume a stock closes at $10.00. Assume the stock opens at 10.75.
Settings
Assume the stock trades up as high as 10.85. Then the price drops to 9.99. In this case the gap would be $0.75, the gap continuation would be 0.10, and the total retracement would be 0.85. The default for this value is 0. Any time a stock opens at a different price than the previous close, that stock might create a gap reversal alerts.
The difference between the open and the close can be less than $0.01.
What the alert shows you
The description of the alert will report the size of the gap and the gap continuation.
Add the quality column to a scan using the 'Gap Up Reversal' alert to see the sum of the gap and the gap continuation.
Related alerts
Filters to pair with the Gap Up Reversal alert
Categories
FAQ
Which gap up stocks are reversing and filling the gap today?
Turn on the Gap Up Reversal alert (GUR) in Trade Ideas Streaming Alerts. By default, the gap up reversal alert will appear when a stock price crosses yesterday's closing price from above for the first time since today's open.
What is the Gap Up Reversal alert?
A gap up reversal is when a stock gaps up at the open, then reverses and crosses yesterday's close for the first time since the open, filling the gap.
How do I see fewer, higher-quality Gap Up Reversal alerts?
Use the optional alert-specific filter immediately to the right of the alert. A higher number tells the alerts server to show only higher-quality alerts, so fewer appear. Leave it blank to see more.
What is the opposite of the Gap Up Reversal alert?
What does gap up reversal mean?
A stock opened higher than yesterday's close and then fell back through that close.
When does the GUR alert fire?
The first time price crosses yesterday's close from above after the open.
Does the alert tell me the gap size?
Yes. The alert reports how large the gap was.
Is a gap up reversal the same as a gap fill?
It goes a step further. A gap fill reaches the prior close. A reversal trades through it.