How to Read Market Structure: A Practical Guide to BOS, CHoCH & Swings

The three states of market structure

Before any of the jargon, market structure boils down to three conditions. Learning to classify which one you're looking at is most of the skill — the labels (BOS, CHoCH) just describe transitions between them.

• Uptrend (bullish): a series of Higher Highs (HH) and Higher Lows (HL) — upward stair-steps where buyers keep pushing price to new peaks and defending higher troughs.
• Downtrend (bearish): a series of Lower Highs (LH) and Lower Lows (LL) — downward stair-steps where sellers keep forcing new lows.
• Range / consolidation: roughly equal highs and equal lows with no clear progression. By many estimates the market spends the majority of its time here (a figure around 70% is often cited, though it varies by instrument and timeframe).

The building blocks: swing highs and swing lows

Everything starts with swing points. A swing high is a candle whose high sits above the candles on both sides — price peaked locally, then turned down. A swing low is the mirror image: a candle whose low sits below its neighbors, marking a local bottom before price turned up.

To filter out noise, many traders require a set number of candles on each side (a value around 3 is common) that are lower for a high, or higher for a low. There is nothing magic about that number — it is a discretionary setting you choose, not a market law. A larger value gives you fewer, more significant swings; a smaller value picks up more minor ones.

BOS vs CHoCH: continuation vs potential reversal

These two terms describe what happens when price breaks a swing point. They are the most-searched distinction in market structure trading, and confusing them is one of the most common errors.

Break of Structure (BOS) — continuation

A BOS occurs when price breaks a swing point in the direction of the existing trend, confirming the trend is intact. In an uptrend, price breaking above the most recent swing high prints a new HH — a bullish BOS. In a downtrend, breaking below the most recent swing low prints a new LL — a bearish BOS. Some traders also call a break of structure an MSB (market structure break).

Change of Character (CHoCH) — potential reversal

A CHoCH is the first structural break against the prevailing trend — the earliest objective hint that a trend may be turning. In an uptrend, it's when price breaks below the most recent Higher Low. In a downtrend, it's when price breaks above the most recent Lower High.

A CHoCH is a warning, not a confirmed reversal. The stronger pattern taught is a CHoCH followed by a BOS in the new direction — meaning structure has actually started printing the opposite sequence (for example, the first Lower High and Lower Low after an uptrend). A note on terms: MSS (Market Structure Shift) is often used as a near-synonym for CHoCH, with some teachers treating MSS as a more aggressive, displacement-driven version. Usage genuinely varies between ICT and broader SMC communities, so focus on the mechanic — continuation versus potential reversal — rather than policing the label.

Internal vs swing structure (why you get false signals)

This is the section that resolves most 'why does my structure keep lying to me' frustration. Swing (external) structure is made of the major highs and lows on your chosen timeframe — it defines the trend you're trading. Internal structure is the smaller swings inside each leg: lower-timeframe wiggles that are useful for refining entries but are a major source of false signals.

A widely taught filter: a valid CHoCH breaks the swing that produced the previous BOS, while internal highs and lows 'don't count' for the major read. Treating an internal pullback as a genuine trend change is frequently cited as the single biggest mistake in reading structure.

The most important rule: candle close, not wick

A break is best confirmed by a candle body closing beyond the level — not by a wick poking through it. A wick that pierces a swing and snaps back is better read as a liquidity sweep (a stop hunt) than a structural break. Price routinely spikes just past an obvious swing to trigger resting stop orders before reversing, which is exactly why close-confirmation exists.

Two practical caveats. First, 'close' is always relative to the timeframe you're analyzing — on a 1H chart you wait for the 1H close. Second, body-close confirmation is a sensible and popular convention, not a universal law; some traders define breaks differently. What matters most is consistency: pick one definition and apply it on every chart, every time. Switching methods chart-to-chart tends to produce contradictory signals.

Reading across timeframes (top-down)

No single timeframe should be read in isolation. The higher timeframe generally carries more weight, so a typical workflow runs top-down: the higher timeframe (weekly/daily) sets directional bias, a mid timeframe shows swing structure, and a lower timeframe (4H/1H/15m) refines entry timing. A 15-minute bullish signal that contradicts a clearly bearish daily chart is lower-probability — confluence across timeframes is generally worth more than any isolated break.

What structure can and can't tell you

• Structure is descriptive, not predictive. It organizes what price has already done; BOS and CHoCH are probabilistic hints, not guarantees of what comes next.
• Marking swings is partly subjective. Two skilled traders can label the same choppy chart slightly differently — if the swings are genuinely ambiguous, that ambiguity is itself a sign you may be in a range.
• Liquidity sweeps and stop hunts are normal, not anomalies — expect price to overshoot obvious levels at times.
• SMC and Goldbach framing like 'smart money,' 'inducement,' and 'liquidity engineering' is an interpretive overlay. The observable object is the price structure itself; narratives about exactly what institutions are doing are interpretation, not measured fact.
• Structure tends to read more cleanly on liquid, smoothly-moving instruments (major forex, futures, large-cap stocks, crypto majors). Overnight equity gaps and illiquid assets can jump levels and distort the read.

Where indicators fit in

Once you can mark swings, BOS, and CHoCH by hand, automated labeling tools can speed up the chart work — but they don't change the fundamentals above. The AlgoKings SMC package and Goldbach (GB) tools are built to auto-detect swing points and tag BOS/CHoCH on the chart, which removes some of the manual work and enforces a consistent definition across instruments. Treat them as an aid to reading structure — a visualization and labeling layer — not as a signal-to-profit machine. The discretionary judgment (which timeframe, whether you're trending or ranging, whether a break is a real close or a sweep) still belongs to you.

This article is educational and is not financial advice. Nothing here promises profitability; no single signal should drive a trade in isolation, and false breaks, ranges, and sweeps are a normal part of every market.