Fibonacci Retracement Levels: Finding Where a Pullback Might Stop
Every stock that trends higher eventually pulls back for a bit before (hopefully) continuing on its way. The hard part isn't noticing the pullback. It's figuring out where it might stop. Buy too early and the stock could keep falling. Wait too long and you might miss the bounce entirely.
Fibonacci retracement levels are one of the most widely used tools for tackling that problem. They're a set of horizontal lines, drawn between a recent high and low on a chart, that mark the price levels where a pullback has historically had a good chance of pausing or reversing. You'll see them referenced constantly in trading commentary, chart annotations, and technical analysis write-ups, so understanding the basic idea is genuinely useful even if you never draw one yourself.
In this article, we'll explain where these levels come from, walk through a simple worked example, and talk honestly about where the tool falls short, because it absolutely does, and knowing its limits matters as much as knowing how to use it.
What Fibonacci Retracement Levels Are
The name comes from the Fibonacci sequence, a famous string of numbers (1, 1, 2, 3, 5, 8, 13, 21, and so on, where each number is the sum of the two before it) first popularized in mathematics centuries ago. Dividing numbers in that sequence by each other produces a handful of recurring ratios, most notably 23.6%, 38.2%, 50%, 61.8%, and 78.6%. Traders noticed decades ago that prices often retrace (pull back) by roughly these percentages before resuming their prior direction, and the pattern stuck around in technical analysis ever since.
You don't need to calculate any of this by hand. A charting tool lets you click once on a recent swing low and once on a recent swing high (or vice versa for a downtrend), and it automatically draws horizontal lines across those key percentage levels between the two points. The logic in plain language is: "if this stock just rallied from $50 to $100, how far back down might it drift before buyers step back in?" The 38.2% level would sit at $80.90, the 50% level at $75, and the 61.8% level at $69.10, each one a place where traders watch for the pullback to slow down or stop.
The 50% level isn't technically part of the Fibonacci sequence at all, but it's included on virtually every retracement tool because round-number halfway points tend to act as psychological support in their own right. The 61.8% level, often called the "golden ratio," is generally considered the most significant of the group. A pullback that blows through it is often read as a sign the prior trend may be in real trouble, not just taking a breather.
A Worked Example: Hypothetical ABC Corp
Let's say shares of a hypothetical company, ABC Corp, rally from $40 to $60 over a couple of months on strong demand for its products. That's the "swing low" and "swing high" we'd anchor our retracement tool to. After the run-up, the stock starts drifting lower as early buyers take profits.
Using the $40 to $60 range, the key retracement levels would fall at:
23.6%: $55.28
38.2%: $52.36
50%: $50.00
61.8%: $47.64
78.6%: $44.28
Suppose ABC Corp's pullback stalls right around $52, finds buyers for a few sessions, and then turns back upward. A trader watching the chart would note that the stock bounced close to the 38.2% level and treat that as a sign the broader uptrend might still be intact. If instead the stock kept sliding and only found support near $47 to $48, that would line up with the 61.8% level, a deeper, more worrying pullback, but still technically within the bounds of a normal correction rather than a trend reversal. If it had kept falling straight through $44 (the 78.6% level) without pausing at any of these levels, that would be a stronger signal the original uptrend had broken down entirely.
Notice that none of this is a prediction. The levels are areas worth watching more closely, not guaranteed floors. Price can, and often does, blow right through all of them.
Here are a couple of charts from our site for the same stock on two different chart options - the first one is on our classic chart it gets plotted automatically and one for the interactive chart where you can draw these using the tools available on this page. I rarely ever use this.
Classic Chart for stock ACN:
Interactive chart tab (Stock is ACN):
The Limits and Risks of Fibonacci Retracement
Fibonacci retracement is popular, but it's worth being clear-eyed about why it works when it works, and when it doesn't.
First, there's a reasonable argument that these levels are at least partly self-fulfilling. Because so many traders watch the same 38.2%, 50%, and 61.8% lines, enough people place buy or sell orders near them that the levels can become support or resistance simply by popular belief, not because of any deeper mathematical truth about markets. That's not necessarily a reason to ignore the tool, but it's a reason not to treat it as a law of nature.
Second, retracement levels are highly subjective in practice. Two traders looking at the same chart can pick slightly different swing highs and lows, which shifts every level and can produce noticeably different conclusions. There's no single "correct" way to draw the lines, which makes the tool easier to use in hindsight than in real time.
Third, and most importantly, a retracement level is a place to pay attention, not a guaranteed turning point. Stocks frequently blow through every Fibonacci level without pausing, especially during strong trends, broad market sell-offs, or after unexpected news. Treating a 61.8% retracement as a sure-fire buy signal, on its own, is a good way to catch a falling stock with no support underneath it at all.
For these reasons, most experienced chart readers use Fibonacci levels as one input among several, often paired with volume, moving averages, or candlestick patterns at the same price area, rather than as a standalone trading signal.
See it on a real chart with TruCharts' stock screener
Reading about retracement levels is one thing; seeing which stocks are actually sitting near one right now is another. The TruCharts stock screener lets you filter the entire market down to stocks currently pulling back toward a key technical level, so instead of scanning charts one at a time you can see today's candidates for a Fibonacci-style setup in a single list.
Subscribe to TruCharts to save your screens and get a head start on next week's setups.
Coming up next in this series: we'll look at the Average Directional Index (ADX), an indicator that helps answer a different question entirely: not where a pullback might stop, but whether the trend underneath it has any real strength to begin with.
This article is for educational purposes only and does not constitute financial or investment advice. The ABC Corp example above is entirely hypothetical and is used only to illustrate how Fibonacci retracement levels are calculated. Always do your own research and consult a licensed financial advisor before making investment decisions.
