The Complete Guide To Measure A Bull Flag(With Illustrations)

Today, you’ll learn how to measure a bull flag effectively. In fact, in a trading bull flag, you can catch a breakout in the stock market to earn significant amounts.

A bull flag is usually found in strong uptrends, and there is a high probability that the price of a security will go up. It may appear in a downtrend. However, the pattern is not usually reliable if it is the case. Do you know how to measure a Bull Flag?

Get the length of the flag pole to measure a bull flag. Add the same distance to the bottom of the flag to get the maximum expected move of the price of the stock.

The real question is, how do we use the bull flag. You can find a lot of tutorials on the web, but do the strategies work?

To know what does a bull flag looks like, you can look at the picture below.

Measure: Target profit is equivalent to the length of the pole. Fortunately, the price moved up after the target profit.

We already know that a breakout from the flag makes traders more interested in the stock. However, you need to predict where the price might move.

In this bull flag pattern target, you are using the flag pole as your target to set your minimum target.

Also, you need to set your profit targets as close to maximum as much as possible. If you read my answer above, you probably know how to measure it.

But if you want to know more, you can continue reading.

In this post; you will learn how to trade the bull flag.

  • What is a bull flag?
  • When to trade?
  • When to enter?
  • When to exit?

I will keep this guide simple so that you will learn the ins and outs of the bull flag pattern.

What is a bull flag in trading?

A bull flag pattern is a price action of security that resembles a flag, and when found in an uptrend, it usually is an indicator of a high uptrend momentum. The confirmation of momentum occurs when there is a breakout at the upper resistance of the flag.

The bullish formation has two essential elements, and these are the flag pole and the flag.


The pole has risen very fast because of strong momentum, and then the flag forms due to profit-taking.

It is pretty basic, and you might say that is obvious. However, if you trade every flag you see, you’ll drain your account faster.

In this bull flag strategy, you should select a strong stock only to avoid false signals.

You might think it is easy to trade the formation, but it is difficult to do in real-time.

In bull flag trading, this pattern requires a lot of screen time and practice. However, you can use our bull flag stock screener if you want to automate the process.

You can download the Amibroker AFL by clicking on the screener link above. Also, there is a tutorial to scan it using the software.

Generally, traders buy at the break at the top of the bull flag stock, and they hit the buy stop to catch the breakout.

However, I don’t do what other traders do. After the breakout, I wait for a small pullback to avoid a false breakout.

Well, I do it to reduce my losses in case the market moves against me.

The Bull flag target is a target measured using the length of the pole of a bull flag. It is the price point where traders often exit half of their positions while managing the other half of the trade. For example, 200 shares owned is reduced to 100 shares at the target price.

When to trade?

Do not take every bull flag you find, and always check if the formation has a strong foundation.


The stock must be trending upward, and if there is no base, just ignore it for your safety.

The bull flag screener on our website has been designed to find only strong stocks. You can use it if you like.

We created the AFL to select only those stocks that have increased by 25% in the last 20 days.

You can download the code at our screener page and look at how we find a bull flag.

If the stock does not have a strong foundation, the momentum may stop.

Most traders fail because of being impatient. You probably took a lot of bull flag trade without a strong foundation.

How did it turn out?

Did the trade fail?

If you didn’t, I would congratulate you.

Always remember that a bull flag is a trading pattern. These flags may show up many times in a bear market.

You have to look at the broader picture. Ask yourself, what is the trend of the market before the bull flag formation appeared.

You should only consider the bullish flag if the trend is up to avoid a false breakout.

When to enter?

Bull flag trading is a method of trading that usually requires experience when deciding when to take entries at the breakout. The trading entries are often decision from possible high to low-risk entries.

There are three possible entries you can take when trading a bull flag.

  • Entry at the break above the flag.
  • Entry at the time of the pullback after the breakout
  • The entry below the top of the flag.

A bullish flag breakout happens when the price of the security breaks the resistance(Top of the bullish flag). It is usually a sign that the asset’s price has a high probability of going up in a short period. Because it is expected to go up, traders can have three entry decisions.


Buying at the time of the breakout has a high level of risk of a fake breakout.

In this bull flag formation, I don’t like buying at the breakout to reduce the level of risk.

I don’t want to be trapped in this kind of situation. However, if I see that the momentum is excellent, I will take the risk anyway.

The stock price may go down, and it may stay inside the flag for a long time.

I usually buy after the pullback from the breakout. A lot of times, I trade, but it’s okay because I would rather have a confirmation.

If I am not confident that the price will continue moving up, I will not buy the stock.

It is just my preference, and it is my trading style. If you want to follow my method, backtest it, and let me know the results.

Buying in anticipation of a breakout has an edge. If you see the price bouncing at the resistance, and the MACD bars are small, take the trade.

Small MACD bars signifies that the price is not yet stretched out. Also, it means that there is room for the upside.

However, if the bars are huge, the price may be stretched out, and it can pull back again.

I just spilled out my secret in using the MACD indicator.

Later on, I will share with you the secrets of MACD, and you will be amazed how we can use it in trading breakouts.

When to exit?

I set the stop loss below the flag. If the price hit it, I immediately sell.

You should always follow your plan, or you are to lose a lot of money.

Do not average down, and always get out of the trade if in case the market is against you.

I take profit at the same length as the pole. When I trade a bull flag, I hold it until I hit the target.

Always measure the flag pole, and use it as your profit target.

Sometimes, I don’t get my goal because I also use a trailing stop to manage my trades.

I hope you learned something today about a bull flag.

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