Indicators

Zig Zag and Fibonacci: How to Follow the Chart's Trend

Astron Team · 09/24/2026 · 4 min read

Anyone who starts looking at price charts quickly notices a problem: price never rises or falls in a straight line. It advances, pulls back a bit, advances again, and this sawtooth of small moves makes it hard to see where the trend is really going. Two tools help solve this when used together: the Zig Zag indicator, which cleans up the noise and highlights the relevant moves, and Fibonacci retracements, which help estimate how far a pullback within the trend might go before the price resumes its main path.

Neither one predicts the future on its own. Their strength shows up when one organizes the chart's visual reading and the other points to price zones with a higher chance of reaction.

What the Zig Zag actually does

The Zig Zag is an indicator that draws straight lines connecting the chart's most significant highs and lows, ignoring smaller swings. It works with a minimum movement parameter, usually a percentage: only when the price moves beyond that percentage from the last marked point is a new line drawn. If you set the Zig Zag to 5%, for example, a 2% correction in the middle of a rally simply won't show up in the drawing.

The result is a cleaner chart, where it becomes easier to identify the up and down legs that make up a trend. It's important to remember a known limitation: the Zig Zag's last segment redraws itself as new prices come in, because the indicator only confirms a high or low after the next move has already happened. That's why it's useful for organizing the reading of what has already occurred, not for generating an entry signal at the exact moment of the turn.

Where Fibonacci retracements come in

Fibonacci retracements start from the observation that, after a strong move, the price tends to give back part of the distance traveled before continuing in the same direction. The most used levels are 23.6%, 38.2%, 50%, 61.8%, and 78.6% of the distance covered between the start and end of the move.

To draw these levels, you need to choose two points: the start and end of a trend leg. This is exactly where the Zig Zag becomes useful, because it has already isolated these legs for you, eliminating the doubt about which minor swing should be used as the reference.

A practical example with the EUR/USD pair

Imagine the Zig Zag shows a clear up leg in the EUR/USD pair, going from 1.0500 to 1.0800 — a move of 300 pips. Applying Fibonacci to this leg, the 61.8% level is at 1.0800 minus 61.8% of 300 pips, that is, 1.0800 minus 185.4 pips, which gives approximately 1.0615. The 38.2% level, in turn, would sit near 1.0685.

If, after the top at 1.0800, the price starts to pull back and approaches the range between 1.0615 and 1.0685, these two levels start getting watched closely: it's a region where, historically, the market tends to find buyers again, if the uptrend is still healthy. This is no guarantee of a reaction — it's just a higher-probability zone that deserves confirmation from other signals before any decision.

How to combine the two in practice

A simple workflow follows three steps. First, apply the Zig Zag to the chart and observe what the last clear trend leg was, from a relevant low to a relevant high (or the opposite, in a downtrend). Second, draw the Fibonacci exactly over that leg, from start to end. Third, wait for the price to approach one of the key levels — usually 38.2%, 50%, or 61.8% — and look for confirmation from another tool, such as a reversal candle pattern, a moving average crossover, or stronger volume in the region.

It's worth reinforcing: this type of analysis helps organize where to look for opportunities, but it doesn't replace risk control. Defining in advance how far you accept being wrong, through a stop, remains essential, because no Fibonacci level is respected by the market all the time.

Precautions when using this combination

• The Zig Zag changes its last segment as new prices come in — don't treat its most recent point as confirmed.
• Fibonacci works best in markets with a defined trend; in sideways markets, the levels lose relevance.
• Always use more than one signal before entering: a touch on a Fibonacci level, on its own, isn't reason enough.
• Practice reading both indicators on a demo account before applying them to real trades — Astron lets you train this kind of reading without committing capital.

Combining Zig Zag and Fibonacci is, in the end, a way to bring more structure to a reading that, without them, would be just intuition about the chart. Start by objectively identifying the trend legs, draw the levels from them, and treat each retracement zone as a question to be confirmed — never as a ready-made answer.