Streaming Alert (Scanner)
Broadening Top Alert (GBTOP)
By Daniel Mirkin, CEO, Trade Ideas. Updated October 2026.
Find stocks forming a broadening top pattern in real time with Trade Ideas Streaming Alerts (Scanner). A broadening top pattern is when a stock has touched the top of a broadening pattern (higher highs and lower lows) and turned back down. Trade Ideas reports it after at least 5 turning points.
Know when the pattern finishes.
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Streaming Alerts show a broadening top the moment it completes, not on the next refresh.
How Trade Ideas finds it: by default, the 'Broadening Top' alert will appear when a stock takes 5 consecutive highs and lows, hits the top of the pattern, and then turns back down. See Trade Ideas plans and pricing to run it live.
What is a broadening top?
A broadening pattern is the opposite of a triangle. The swings get bigger. Each high is higher than the last, and each low is lower, so the lines spread apart like a megaphone.
A broadening top alert means price touched the upper edge of the pattern and then turned back down.
Parts of a broadening top
Higher highs
Rallies keep going a little further than before.
Lower lows
Selloffs keep going a little lower too. The stock is getting wilder, not calmer.
Turn at the top line
After at least five swings, price tags the upper line and turns down. That is the alert.
How traders use it
Step 1: Let the Trade Ideas alert find it
Turn on the Broadening Top alert (GBTOP). These alerts use local highs and lows with volume confirmation, so they find longer patterns than most. See it live in the Web Dashboard.
Step 2: Wait for the trigger
Trader tip
Traders usually look for the turn to hold. A quick reclaim of the high means the swing is not done.
Step 3: Entry
Some short the turn off the upper line and aim for the lower line. Others treat it as a warning to take profits on a long.
Step 4: Exit
With swings this wide, stops are often wider too, above the recent high. That is how traders tend to approach it, not advice.
Tips
- These patterns show indecision. Position size matters more than usual.
- Expect big moves inside the pattern. That is what defines it.
- A close outside the megaphone ends the pattern.
- The mirror alert is Broadening Bottom (GBBOT).
Past results, including backtests, are not indicative of future results.
How the Broadening Top alert works
The broadening pattern, also called the inverted triangle pattern, is a common pattern in technical analysis. This pattern is defined as a series of higher highs and lower lows. It takes at least 5 consecutive highs and lows in this pattern before we report it.
Key point
A broadening top alert means that the price touched the top of the pattern, then turned back down.
These are part of a series of alerts all based on local highs and lows. Compared to most of our alerts, these alerts have longer terms and are based on more complicated chart patterns. These patterns take longer to see, but they also last longer.
Settings
The analysis for these alerts starts with our standard volume confirmation. This allows us to see which price trends are significant, and which prints should be filtered out. You need more than just a price trend to define a high or a low. You need significant volume below a high price, just to set a baseline. Then you need significant volume near or at the high price to define the high price. Finally, you need significant volume below the price, again, to show that the trend has reversed itself and the price has turned around. Lows are defined similarly. After you have a series of these turning points, you can see the patterns described in these alerts.
The description of each alert lists the prices of the highs and lows that formed the pattern. This includes our normal algorithm for removing stray prints. This shows the most extreme prices where more than a trivial amount of volume occurs. In some cases, this price is an average of several prints, if no one print described the turning point adequately.
Key point
The description also includes the times when the pattern started and ended. As a result of the smoothing and confirmation, the times are not as precise as the prices. This is particularly obvious with NASDAQ stocks. Often a significant turning point will occur between one day's close and the following trading days open.
The alert will attempt to find the exact turning point, but since trading gradually trails off in the evening, and gradually picks up in the morning, there may be no specific point in time. The alert will just give its best estimate between the open and the close. For NYSE stocks, the open is much more precise, so these alerts will often list the open as the exact starting time.
Key point
We report only the times when the stock was at the first high or low price and the when the stock was at the last high or low price. The definition of these alerts requires the stock price to move in a certain direction before and after this to define a turning point. We don't include this additional period in the time.
Each of these alerts can be filtered based on the volume inside the pattern. Like the times, we only include volume between when the stock was at the first high or low and when the stock was at the last high or low. We do not include the volume before and after these turning points.
Default settings
Settings
By default, the 'Broadening Top' alert will appear when a stock takes 5 consecutive highs and lows, hits the top of the pattern, and then turns back down.
Custom settings
Settings
For 'Broadening Top' 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 'Broadening Top', the user can filter the alert by hours traded.

Normally there are 6.5 hours between the open and the close. But, what about premarket and post market?
Key point
If I see a pattern that lasted from noon yesterday to noon today, is that any better than a pattern that lasted from the open this morning to the close this afternoon? How much better? We weight the pre and post market according to volume. On an average day an average NASDAQ 100 stock will trade roughly 1 hour's worth of volume between the close and the following open. If you want to see stock patterns that lasted for a whole day, a good estimate is 7.5 hours, 6.5 for normal hours plus 1 for the pre and post market.
The same rules apply during the day. If a chart pattern lasts for one hour starting from the open, it will almost always be considered a stronger pattern than if it lasted one hour starting from the beginning of lunch. Hours are just an estimate. Volume is the major factor in this filter. Stocks trading on higher than average volume will satisfy this filter faster than stocks trading on lower than average volume.
What the alert shows you
Key point
The description of each alert lists the prices of the highs and lows that formed the pattern. It also includes the times of when the pattern started and ended.

The quality value on a scan using the 'Broadening Top' alert defines the number of hours since the measured pattern has been established.

Related alerts
Filters to pair with the Broadening Top alert
Categories
FAQ
Which stocks are forming a broadening top pattern right now?
Turn on the Broadening Top alert (GBTOP) in Trade Ideas Streaming Alerts. By default, the 'Broadening Top' alert will appear when a stock takes 5 consecutive highs and lows, hits the top of the pattern, and then turns back down.
What is the Broadening Top alert?
A broadening top pattern is when a stock has touched the top of a broadening pattern (higher highs and lower lows) and turned back down. Trade Ideas reports it after at least 5 turning points.
How do I see fewer, higher-quality Broadening Top 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 Broadening Top alert?
What is a broadening top?
A widening pattern of higher highs and lower lows where price just turned down from the upper edge.
Is a broadening pattern the same as a megaphone?
Yes. It is also called a megaphone or an inverted triangle.
Is a broadening top bearish?
The latest swing is down, so it points lower for now. The pattern itself shows a choppy, unsettled stock.
Why are broadening alerts rare?
They need at least five swings that each go further than the last, which takes time to build.


