Flat Base

Flat Base

A flat base is a very different type of indicator compared to other bases, but one that can be very powerful once you know what you're looking for.
By: Harry Atkins
Harry Atkins
Harry joined us in 2019, drawing on more than a decade writing, editing and managing high-profile content for blue… read more.
Updated: Jan 21, 2022
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4 min read

If you’re reading these lessons in order, you just learned all about double-bottom bases. Our next lesson focuses on a powerful type of base, albeit one with very different characteristics than what we’ve seen before. Say hello to the flat base.

I. What Is a Flat Base?

A flat base is a price consolidation formed by a stock after a prior uptrend. It’s defined by a shallower decline than that seen in other forms of bases. Also, flat bases usually form after a stock has broken out from a previous consolidation. It’s thus often referred to as a “second-stage base.”

II. Why Is a Flat Base Important for Investors?

Every form of base gives winning stocks a chance to pause before embarking on another big surge in price. What makes the flat base different is that it takes to form after a prior breakout. 

This gives you two potential paths to success. If you were lucky and shrewd enough to buy the stock as it broke out of its first-stage base and held on throughout the uptrend that followed, a subsequent flat base allows you to add more shares to your winning position. If on the other hand you’re just now noticing this stock’s potential, the flat base gives you a chance to jump in for the first time, assuming a healthy breakout in big volume occurs at the end of that flat base.

III. What Are the Stages of a Flat Base?

Unlike with cup-with-handles and other forms of bases, a flat base doesn’t require as big a prior uptrend to take shape. 

After initially taking shape, you’ll see a milder price decline than you would in other bases. In some cases it’s a gentle slope downward lasting a few weeks. In other cases, the price consolidation truly does look “flat,” with only a very small pullback. 

The final stage, as with any base, is the breakout. In this case you’re looking for a big price surge in heavy volume as the stock surges out of its price consolidation. 

IV. What Are the Prerequisites of a Flat Base?

The first prerequisite of a flat base is a prior uptrend of 20% or more, typically following a breakout from a prior base.

Befitting its name, flat bases mustn’t include price drops that are too large; the price should dip no more than 15% from the top of a flat base to its lowest point.

A flat base should take at least five weeks to form. The first down week after an uptrend counts as Week #1.

Your ideal buy point occurs on the day the stock surges above the top of that flat base. You want to buy in 10 cents above the top of the base, or as close to that 10-cent marker as you can get, if you’re a little later than that. 

Finally, volume should surge at least 40%-50% above its daily average. The bigger the volume surge, the more powerful the breakout and the more likely you are to make money when you buy at that breakout point.

Moving on…

We hope you enjoyed that look at flat bases. If you’re ready for the next trading lesson (on V-shaped bases), click below. If you want more time to explore first, check out some of our other educational articles on technical analysis for stocks, right here on this site.

Fact-checking & references

Our editors fact-check all content to ensure compliance with our strict editorial policy. The information in this article is supported by the following reliable sources.

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Invezz is a place where people can find reliable, unbiased information about finance, trading, and investing – but we do not offer financial advice and users should always carry out their own research. The assets covered on this website, including stocks, cryptocurrencies, and commodities can be highly volatile and new investors often lose money. Success in the financial markets is not guaranteed, and users should never invest more than they can afford to lose. You should consider your own personal circumstances and take the time to explore all your options before making any investment. Read our risk disclaimer >

Harry Atkins
Financial Writer
Harry joined us in 2019, drawing on more than a decade writing, editing and managing high-profile content for blue chip companies, Harry’s considerable experience in the… read more.

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