Swing Low — The 3-Candle Formation That Builds Market Structure

Most traders draw "support" wherever some wick happened to stick out — then wonder why half their levels don't work. The ICT method solves this problem with one mechanical rule: the only low that counts is one that passes the three-candle test. This small formation — the swing low — is the smallest building block of all market structure. It's what higher lows in an uptrend are made of, and lower lows in a bear market, and the levels that get broken in a BOS or CHoCH. If you can't mark a swing low correctly, you're building your analysis on sand.

What is a swing low

A swing low (a structural low) is a three-candle formation in which the middle candle has a low lower than the candle to its left and the candle to its right. The word "swing" refers to a pivot around a point — price moves down, turns, and walks away upward, leaving a local bottom behind. That bottom, defined by the low of the middle candle, is the swing low.

Its mirror image is the structural high (swing high): three candles where the middle one has a high above both of its neighbors. The test is identical, just inverted — so everything you read here about lows applies symmetrically to highs.

Why is such a simple formation so important in the ICT method? Because all of market structure is made exclusively of these points. An uptrend is a series of higher highs and higher lows — but a "low" in that definition doesn't mean any random spot where price dipped for a moment; it means a fully-fledged swing low. A Break of Structure (BOS) is the break of a level defined by a swing. A Market Structure Shift (MSS) is a swing taken out with momentum. Without correctly marked swings, none of these concepts exist.

The swing low also plays a second role: it's the natural place for a stop loss. Since a structural low marks the point where buyers took control, breaking it means the bullish scenario no longer applies — and that's exactly where your long position should end.

How to identify a swing low step by step

The test is fully mechanical and takes a few seconds:

1. Find a candidate. Spot a candle whose low looks like the lowest in the area — usually the point where a downward move visibly turned around.
2. Check the candle on the left. Its low must be higher than the candidate's low. If it isn't — the candidate is out, or the actual low is a different candle.
3. Check the candle on the right. Its low must also be higher. Only the close of this third candle confirms the formation — a swing low doesn't exist "in progress," only after the fact.

If both conditions hold, the low of the middle candle is a confirmed swing low. For a high, the procedure is inverted: the middle candle's high must be above the highs of both neighbors.

A few nuances worth knowing. First, candle color means nothing — the middle candle can be bullish, bearish, or a doji. Only the arrangement of the lows counts. Second, it's the wick that counts, not the body: you compare low to low, even when those are long shadows. Third, the formation is only confirmed once the third candle closes — while that candle is still forming, the low is merely potential. In crypto, where a single minute can redraw half the chart, this patience saves you from marking levels that vanish moments later.

Practice it on any chart: open BTC on H4, scroll back a few hundred candles, and circle every trio where the middle candle has the lowest low. After a few days, your eye starts catching swings automatically. And if you'd rather see the finished skeleton right away — our SRL indicator marks swing lows and swing highs on the chart automatically, along with the structure they build.

How to use swing lows in your trading

A single low means little — the power of swings shows up when you read them in series and in the context of the higher timeframe.

Reading the trend. Compare successive swing lows: each one higher — the uptrend is alive; each one lower — the market is in a bearish structure. The distance between lows says something about the strength of the move: wide, sweeping swings mean a healthy trend; tight, twitchy ones mean fading momentum or the start of a consolidation.

Decision levels. The last higher low in an uptrend is the critical point of the entire structure: defending it keeps the trend alive, and breaking it generates a Change of Character (CHoCH) signal. So always keep the most recent structural low marked — it's what answers the question "where does the bullish scenario end."

HTF→LTF entry logic. The practical framework looks like this: on H4 you identify the uptrend and the last swing low that should hold. When price corrects into its area — ideally into a zone overlapping an Order Block or an FVG — you drop to M15 and wait for a fresh swing low to print there, followed by a break of the local high to the upside. Enter on confirmation, stop loss a few ticks below the fresh low, target at the previous structural high. This way the higher-timeframe swing low gives you the zone, and the lower-timeframe swing low gives you a concrete trigger and a tight stop.

A liquidity map. Swing lows are also a map of stop losses: below every clear low hang the protective orders of buyers, and where two or three lows sit at a similar level (equal lows), liquidity is thickest. The market regularly dips down for it with a wick before moving in the real direction — so knowing where your swings are also means knowing where the market will hunt.

A quality filter. Not every swing low carries the same weight. A low printed in the middle of nowhere holds poorly; a low formed at a higher-timeframe level — in a demand zone, on an Order Block, after a liquidity grab — is a different league entirely. The three-candle test finds the lows; context decides which ones are tradeable. In the ICT hierarchy, swings get promoted further still: into short-term, intermediate-term and long-term lows (STL, ITL, LTL) — covered in a separate article.

Most common mistakes

• Marking the low before the third candle closes. The formation is only confirmed when the candle on the right closes with a higher low. Drawing "live" ends with you erasing half your markings.
• Comparing bodies instead of wicks. The test is about candle lows — the tips of the shadows. Bodies have nothing to do with it.
• Treating every swing as a level to trade. An indicator or manual marking will find dozens of lows — the tradeable ones are those with context: at HTF levels, after a liquidity grab, aligned with the direction of structure.
• Ignoring the timeframe. An M5 swing low doesn't invalidate H4 structure. Before you declare "the low broke," check which timeframe that low even existed on.
• Confusing a swing low with ruler-drawn "support." Support drawn through two random wicks is guesswork. A swing low is an objective, repeatable formation — two people applying the same test will mark the same points.
• Forgetting the symmetry. Everything above applies to swing highs too. If you're shorting ETH, your reference point is the last lower high — and it's that level breaking that kills the bearish scenario.

The swing low looks trivial — three candles, one rule. But those three candles are what every structure, every BOS and every trend reversal you'll ever trade is built from. Master the brick, and the wall builds itself.

FAQ

Rafał — Krypto Bez Ściemy

Trader and founder of Strefa Tradingu. He’s been breaking crypto down on YouTube for years — no hype, no signals, with a focus on market structure and risk management.

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