Break of Structure and Change of Character Explained
By Mind Math Money | Last updated: April 7, 2026
reak of Structure (BOS) tells you the trend is continuing. Change of Character (CHOCH) tells you the trend might be reversing. Together, these two signals turn subjective trend reading into something mechanical and rule-based, so two traders looking at the same chart can reach the same conclusion.
This article breaks down both concepts step by step, shows how they work in uptrends and downtrends, clears up the confusion around Market Structure Shift (MSS), and gives you a simple framework you can apply to any chart today.
Key Takeaways
Break of Structure (BOS) happens when price breaks the previous swing point in the trend direction, confirming that the trend is still intact.
Change of Character (CHOCH) is the first break against the established trend, and it signals that a trend change may be starting.
A CHOCH alone does not confirm a reversal. You need a BOS in the new direction after the CHOCH to confirm a complete trend change.
Market Structure Shift (MSS) is used by most traders as a synonym for CHOCH. Stick with BOS and CHOCH to keep your terminology clear.
These two signals alone can give you a better grasp of market structure than most traders have.
What Is Break of Structure (BOS)?
Break of Structure, or BOS, is the signal that tells you the current trend is continuing. It is the most basic building block of market structure analysis.
In an uptrend, a BOS happens when price pushes above the previous swing high. That new high confirms that buyers are still in control and the upward trend is intact. In a downtrend, a BOS happens when price drops below the previous swing low, confirming that sellers are still driving price lower.
Think of it this way. An uptrend is defined by higher highs and higher lows. Every time price makes a new higher high, that is a break of structure. It is the market proving, one swing at a time, that the trend is alive.
How to Spot BOS on a Chart
The process is simple:
Identify the current trend direction (higher highs and higher lows for an uptrend, lower highs and lower lows for a downtrend).
Mark the most recent swing high (in an uptrend) or swing low (in a downtrend).
When price breaks beyond that level, you have a BOS.
In a clean uptrend, you will see a series of BOS signals stacking on top of each other. Each new swing high that gets broken is another confirmation that the trend is holding.
BOS in Messy, Real-World Charts
Textbook examples show perfect staircase patterns with clean higher highs and higher lows. Real markets are rarely that neat. Price will chop around, form messy pullbacks, and test levels multiple times before making the next move.
The key rule in a real uptrend is this: as long as price is holding the most recent swing low, the uptrend is still valid. The price does not need to move in a straight line. It just needs to keep respecting the low of the trend while eventually pushing to a new high. When that new high prints, you have your BOS.
One of the biggest mistakes traders make is marking every minor swing as a structure point. Not all highs and lows are equal. Focus on the swing points that are clearly visible and significant on your timeframe. A tiny wick above a previous candle is not the same as a strong close beyond a key swing high.
Wick Breaks vs. Real Breaks
This is worth calling out separately because it trips up a lot of traders. A wick that briefly pokes above a swing high and then closes back below it is not a confirmed BOS. Wicks beyond structure levels are often liquidity grabs where the market reaches up to trigger stop-losses and breakout orders, then reverses.
For a more reliable BOS signal, wait for a candle body close beyond the structure level. If price closes back inside the range, treat it with skepticism regardless of how far the wick extended.
What Is Change of Character (CHOCH)?
Change of Character, or CHOCH, is the first meaningful break against the established trend. If BOS tells you the trend is continuing, CHOCH is the early warning that something is changing.
In an uptrend, a CHOCH happens when price breaks below the most recent swing low. That is the first time the pattern of higher highs and higher lows has been violated, and it signals that the uptrend may be losing steam.
In a downtrend, a CHOCH happens when price breaks above the most recent swing high. That break tells you sellers may be losing control and a potential reversal could be forming.
A CHOCH can indicate two things. It can signal a full trend change from bullish to bearish (or the reverse). But it can also signal a shift from a trending market into a sideways, range-bound market. Not every CHOCH leads to a clean reversal, and this is an important point to keep in mind.
CHOCH Is a Warning, Not a Guarantee
This is where many traders get burned. They see a CHOCH and immediately flip their bias, treating it as a confirmed reversal. But a CHOCH is only the first indication that the trend might be changing. It is not proof.
To actually confirm a complete trend change, you need a BOS in the new direction after the CHOCH. Here is the sequence for a bearish-to-bullish reversal: price is making lower lows and lower highs (downtrend). Then price breaks above the most recent swing high (CHOCH). Then price pulls back, holds a higher low, and breaks to a new high (BOS in the new uptrend direction). Only after that BOS can you say the trend has fully reversed.
The CHOCH tells you to pay attention. The BOS after the CHOCH tells you to act.
BOS and CHOCH in a Downtrend
The same principles apply in reverse when the market is falling. In a downtrend, you are looking for lower lows and lower highs.
A BOS in a downtrend happens when price breaks below the previous swing low, confirming that sellers are still in control and the downtrend continues.
A CHOCH in a downtrend happens when price breaks above the most recent swing high. That is the first sign that the selling pressure may be fading.
After a CHOCH in a downtrend, watch for the next swing. If price pulls back, forms a higher low, and then breaks to a new high, that BOS confirms the trend has shifted to bullish. At that point, you have the full picture: one low, a higher low, one high, and no matter where the move ends, you will have a higher high. That is the definition of a new uptrend.
BOS vs. CHOCH: Side-by-Side Comparison
Here is a quick reference to keep the two concepts clear:
Break of Structure (BOS)Change of Character (CHOCH)What it signalsTrend continuationPotential trend changeIn an uptrendPrice breaks above the previous swing highPrice breaks below the previous swing lowIn a downtrendPrice breaks below the previous swing lowPrice breaks above the previous swing highWhat it meansThe trend is still intactSomething is changing, but it is not confirmed yetActionStay with the trendWatch closely for confirmation (BOS in the new direction)ReliabilityHigh when aligned with the dominant trendNeeds follow-through to confirm a real reversal
What About Market Structure Shift (MSS)?
If you have spent time studying Smart Money Concepts or ICT trading, you have probably come across the term Market Structure Shift, or MSS. This is where trading terminology gets confusing.
Most traders define MSS the same way as CHOCH. It refers to the first break against the current trend that signals a potential reversal. Some traders draw a distinction, treating MSS as a shorter-term signal and CHOCH as a longer-term confirmation, but there is no universal standard.
The safest approach is to stick with BOS and CHOCH. These two terms are clearly defined and widely understood. If you hear someone talk about a Market Structure Shift, they are almost certainly describing what we call a Change of Character. But for your own analysis, using BOS and CHOCH keeps things clean and avoids the ambiguity.
How to Identify BOS and CHOCH: A Step-by-Step Checklist
Use this process every time you sit down to analyze a chart:
Determine the current trend. Is price making higher highs and higher lows (uptrend), or lower highs and lower lows (downtrend)? If neither, you are in a range.
Mark the key swing points. Identify the most recent significant swing high and swing low. These are your structure levels.
Watch for a break. If price breaks the swing point in the trend direction, that is a BOS. The trend continues.
Watch for a break against the trend. If price breaks the swing point against the trend direction, that is a CHOCH. The trend may be changing.
Wait for confirmation after a CHOCH. Do not flip your bias on a CHOCH alone. Wait for a pullback and a BOS in the new direction before treating the trend as reversed.
Check the candle close. Make sure the break is a real body close beyond the level, not just a wick. Wick breaks are often traps.
Use higher timeframes for context. A CHOCH on a 5-minute chart inside a strong daily uptrend means a lot less than a CHOCH on the daily chart itself. Always know what the bigger picture looks like.
Common Mistakes When Using BOS and CHOCH
Treating every CHOCH as a confirmed reversal. A CHOCH is a warning signal, not a trade signal on its own. Without a follow-up BOS in the new direction, the original trend could easily resume.
Using weak swing points as structure. If the swing high or low you are watching is barely visible, it probably is not significant enough to build a trade thesis around. Focus on swings that are obvious and clean.
Ignoring the higher timeframe. A BOS on a 15-minute chart does not override a CHOCH on the 4-hour chart. Higher timeframes carry more weight. Always check the bigger structure before making decisions on lower timeframes.
Entering the moment structure breaks. Jumping in the second price crosses a level leads to getting caught in false breakouts. Wait for the candle to close, and ideally wait for a retest of the broken level before entering.
Confusing liquidity grabs with real breaks. The market often pushes just past a key level to trigger stops and collect liquidity, then reverses. A wick beyond structure that snaps back quickly is not a real break. It is a trap designed to shake out weak hands before the real move.
Where BOS and CHOCH Fit in Smart Money Concepts
BOS and CHOCH are foundational tools in the Smart Money Concepts (SMC) framework. They do not work in isolation. Once you can read market structure with BOS and CHOCH, you can layer on other SMC concepts for higher-probability setups.
For example, after a CHOCH signals a potential reversal, traders often look for an order block (the last opposing candle before the move) as a potential entry zone. They combine this with a Fair Value Gap (an imbalance left by a strong move) and watch for a liquidity sweep (a wick past a key level) to confirm that smart money has entered.
The sequence often looks like this: the market sweeps liquidity past a key level, prints a CHOCH, then retraces to an order block. That confluence of signals is what SMC traders use to time entries with more precision.
If you want to go deeper into Smart Money Concepts, the full MindMathMoney SMC trading course on YouTube covers order blocks, Fair Value Gaps, liquidity, and how all of these tools connect with BOS and CHOCH.
Quick Reference: Write This Down
If you take away just two things from this article:
BOS = Continuation. When you see a break of structure, the trend is confirmed and still moving. If you trade with the trend, BOS is the signal you need to identify.
CHOCH = Early warning. When you see a change of character, the trend may be starting to shift. But do not act on it alone. Wait for a BOS in the new direction to confirm the reversal.
These two signals are all you need to keep your trend reading simple, clear, and rule-based. Master them, and you will have a better understanding of market structure than most traders.
Frequently Asked Questions
What is a Break of Structure (BOS) in trading?
A Break of Structure is when price breaks beyond the previous swing point in the direction of the current trend. In an uptrend, that means a new high above the last swing high. In a downtrend, that means a new low below the last swing low. It confirms that the trend is continuing.
What is a Change of Character (CHOCH) in trading?
A Change of Character is the first break against the established trend. In an uptrend, it happens when price breaks below the most recent swing low. In a downtrend, it happens when price breaks above the most recent swing high. It signals that the trend may be shifting, but it needs confirmation from a follow-up BOS.
What is the difference between BOS and CHOCH?
BOS confirms trend continuation. CHOCH signals a potential trend reversal. BOS breaks structure in the direction of the trend, while CHOCH breaks structure against the trend. A CHOCH is the warning, and a BOS after the CHOCH is the confirmation.
Is Market Structure Shift (MSS) the same as Change of Character (CHOCH)?
For most traders, yes. Market Structure Shift and Change of Character describe the same event: the first break against the current trend. Some traders use MSS for shorter-term shifts and CHOCH for larger trend changes, but there is no universal standard. Sticking with BOS and CHOCH avoids the confusion.
How do you confirm a trend reversal using BOS and CHOCH?
First, look for a CHOCH, which is the first break against the current trend. Then wait for a pullback and a BOS in the new direction. For example, if a downtrend prints a CHOCH (price breaks above the last swing high), wait for price to pull back, hold a higher low, and then break to a new high. That BOS confirms the new uptrend is in place.
Can BOS and CHOCH give false signals?
Yes. Wick breaks that do not close beyond the structure level are common traps. Liquidity grabs can push price past a key level briefly before reversing. That is why you should always wait for a candle body close beyond the level and ideally a retest before treating any break as confirmed. Using higher timeframes for context also filters out noise from lower timeframe false signals.
This article is based on a MindMathMoney YouTube video and has been expanded with additional research, updated data, and original analysis. MindMathMoney is an independent trading and markets educator. This is educational content, not financial advice.
