™Break of structure (BOS) is when price breaks a swing point in the same direction as the trend — a new higher high in an uptrend, or a new lower low in a downtrend. It confirms the trend is still in charge.
Change of character (CHoCH) is when price breaks a swing point against the trend — in an uptrend, it closes below the last higher low. It is the first sign that the side in control may be changing.
Reading structure first
Both terms only make sense once you have marked the swings. An uptrend is a series of higher highs and higher lows; a downtrend is lower highs and lower lows. Mark the swing highs and lows on the timeframe you trade, then watch which ones break.
| Break of structure (BOS) | Change of character (CHoCH) | |
|---|---|---|
| Direction | With the trend | Against the trend |
| In an uptrend | Price breaks above the last higher high | Price breaks below the last higher low |
| In a downtrend | Price breaks below the last lower low | Price breaks above the last lower high |
| What it suggests | Trend continuation | Possible reversal — the first warning |
| Common use | Look for pullbacks to join the trend | Stop adding in the old direction; wait for confirmation |
Why a CHoCH is not a reversal yet
A single change of character is a warning, not a verdict. Price often breaks a swing low in an uptrend, grabs the liquidity below it, and then resumes higher — the break was a liquidity sweep, not a change of trend. Many traders wait for the new direction to prove itself: a CHoCH followed by a BOS in the new direction.
Wick or close?
Decide your rule and keep it. Counting a wick through a swing as a break produces far more signals and far more false ones. Requiring a candle close beyond the level is slower but filters out most sweeps. Whichever you choose, apply it the same way every time — inconsistent marking is the most common reason two traders disagree about the same chart.
The mistakes that cost the most
- Mixing timeframes. A CHoCH on the 5-minute chart is a small event inside the 4-hour structure. Know which structure you are trading.
- Marking minor swings. If every small wiggle is a swing point, every candle becomes a BOS or a CHoCH. Use swings that are clear on the chart without zooming in.
- Treating CHoCH as an entry. It tells you the old trade idea is in doubt. A new trade still needs a level, a stop and an acceptable risk-to-reward.
Structure labels in LiveTradingAI
LTAI Chart labels market structure automatically as part of its smart-money tools, alongside order blocks and fair value gaps. On TradingView, LTAI Price Action Concept marks BOS and CHoCH with consistent rules so the same chart is always read the same way. Open LTAI Chart free →