CB50
▼ Bearish
Streaming Alert (Scanner)
Crossed Below 50 Day Moving Average Alert (CB50)
By Daniel Mirkin, CEO, Trade Ideas. Updated October 2026.
Find stocks crossing below their 50-day moving average in real time with Trade Ideas Streaming Alerts (Scanner). A 50-day moving average cross is when price moves below the stock's 50-day simple moving average. This alert requires sufficient volume.
See the cross when it happens, not on tomorrow’s chart.
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Streaming Alerts show the cross below the 50 day moving average the moment it happens, with volume behind it.
How Trade Ideas finds it: by default, the Crossed Below 50 Day Moving Average alert appears when the price of a stock crosses below its 50 day moving average with sufficient volume. See Trade Ideas plans and pricing to run it live.
Why does a break below the 50 day moving average matter?
A cross below the 50 day moving average happens when a stock that was trading above its 50 day average falls under it. Traders often see it as the medium-term trend weakening.
The alert needs sufficient volume with the move, which filters out quiet drifts through the line.
Parts of a cross below the 50 day
Above the line
The stock had been holding over its 50 day average.
The average itself
Fifty days of closing prices averaged into one slow line.
Break under
Price drops below the line on enough volume. That is the alert.
How traders use it
Step 1: Let the Trade Ideas alert find it
Turn on the Crossed Below 50 Day Moving Average alert (CB50) to see which stocks are losing that line today. See it live in the Web Dashboard.
Step 2: Wait for the trigger
Trader tip
Plenty of traders wait for a daily close below the line, since intraday breaks often snap back.
Step 3: Entry
Holders may trim or exit. Shorts may enter on a bounce to the line that fails.
Step 4: Exit
For shorts, a stop back above the line is common. This is one common approach, not a recommendation.
Tips
- A falling 50 day line makes the break more meaningful.
- Watch the broader market. Many stocks break their 50 day together on weak days.
- Heavy volume on the break draws more attention.
- The bullish counterpart is CA50.
Past results, including backtests, are not indicative of future results.
How the Crossed Below 50 Day Moving Average alert works
Simple Moving Average (SMA) is a commonly used technical indicator that helps smooth out price data to identify trends over a specified period of time. The SMA is calculated by taking the average price of a security over a set number of periods, dividing the sum by the number of periods. Simple Moving Average (SMA) is a commonly used technical indicator that helps smooth out price data to identify trends over a specified period of time. The SMA is calculated by taking the average price of a security over a set number of periods, dividing the sum by the number of periods. The 50-period moving average is a widely used technical indicator in trading and investing. Its primary benefits include:
- Trend Identification: The 50MA helps traders and investors identify the overall trend in a stock or market. If the current price is consistently below the 50MA, it may suggest a downtrend.
- Smoothing Price Data: Moving averages, including the 50MA, smooth out price data, reducing noise and making it easier to visualize the underlying trend. This smoothing effect helps traders filter out short-term fluctuations and focus on the broader market direction.
- Support and Resistance Levels: The 50MA can act as a dynamic support or resistance level. In a downtrend, it may face resistance. Traders use these levels to make decisions about entering or exiting positions.
- Confirmation of Trends: Crosses of the price over or under the 50MA can be used as signals to confirm trends. For example, a price crossing below the 50MA might be considered a bearish signal, suggesting potential downward momentum.
- Reversal Indication: Changes in the relationship between the price and the 50MA can indicate potential reversals. For instance, if a stock that was in a downtrend crosses above its 50MA, it may signal a potential reversal to an uptrend.
- Reference Point for Traders: Many traders use the 50MA as a reference point when developing trading strategies. It serves as a common and widely watched indicator, providing a shared reference for market participants.
The alert listed here requires statistical confirmation before it appears. This filters out noise, but requires a slight delay. This analysis involves price, time, and volume. If the price continues to move around the 50 day moving average, this alert may never appear. Once the price chooses a direction the exact amount of time required for the alert to appear depends on volume. The statistical analysis does not require that every print cross the 50 day moving average before the alert is displayed. The analysis filters out insignificant prints that go against the general trend. It is even possible, although unlikely, that the last print disagrees with the analysis as a whole.
Default settings
Settings
By default, the Crossed Below 50 Day Moving Average alert appears when the price of a stock crosses below its 50 day moving average with sufficient volume.
What the alert shows you
The description column will report at which price the stock crossed below its moving average.
Related alerts
Filters to pair with the Crossed Below 50 Day Moving Average alert
Categories
FAQ
Which stocks just crossed below their 50-day moving average?
Turn on the Crossed Below 50 Day Moving Average alert (CB50) in Trade Ideas Streaming Alerts. By default, the Crossed Below 50 Day Moving Average alert appears when the price of a stock crosses below its 50 day moving average with sufficient volume.
What is the Crossed Below 50 Day Moving Average alert?
A 50-day moving average cross is when price moves below the stock's 50-day simple moving average. This alert requires sufficient volume.
What is the opposite of the Crossed Below 50 Day Moving Average alert?
What does it mean when a stock falls below its 50 day moving average?
The stock is trading under its average price for the last 50 days, which many traders read as a weaker trend.
Should I sell when a stock breaks its 50 day?
Some traders use it as a reason to reduce risk. Others wait for a close. It depends on your plan.
Does CB50 fire on small moves?
It requires sufficient volume, so quiet drifts below the line are filtered out.
Is there a 200 day version?
Yes, Crossed Below 200 Day Moving Average (CB200).