BOS and CHoCH: reading market structure
In one line: the BOS (Break of Structure) confirms the current trend, the CHoCH (Change of Character) signals it may reverse. They are the two building blocks of structure reading in Smart Money Concepts. Here is the difference, how to spot them on a chart, and how to trade them cleanly.
What is market structure?
Market structure is simply the sequence of highs and lows. In an uptrend, price makes higher highs and higher lows; in a downtrend, the opposite. Reading structure means always knowing which way the market is oriented. BOS and CHoCH are the two events that move that structure forward.
The BOS (Break of Structure): continuation
A Break of Structure is the break of the last high (uptrend) or the last low (downtrend) in the trend direction. In an uptrend, when price pushes above its last high, it prints a bullish BOS: the trend is confirmed and continues. The BOS says "we keep going".
The CHoCH (Change of Character): the reversal alert
A Change of Character is the first sign the trend is shifting. In an uptrend, it is the break of the last low (the last higher low). The market just did something it "should not" do in a healthy trend: it changed character. The CHoCH says "watch out, this could reverse". It does not confirm anything yet, it warns.
BOS or CHoCH: the difference in one line
BOS = continuation (break in the trend direction). CHoCH = potential reversal (break against the trend). The beginner trap: confusing the two and buying a bearish CHoCH thinking it is a continuation. The rule: a CHoCH is waited for, a BOS is confirmed.
How to trade them (step by step)
- Read the trend. Identify the trend through the sequence of highs and lows: higher highs and higher lows in an uptrend, lower highs and lower lows in a downtrend.
- Mark the key levels. Mark the last significant high and the last significant low (the points that structure the current trend).
- Spot the BOS. If price breaks the last high (uptrend) or the last low (downtrend) in the trend direction, it is a Break of Structure: the trend is confirmed.
- Spot the CHoCH. If price breaks the last low in an uptrend (or the last high in a downtrend), it is a Change of Character: a reversal alert.
- Confirm before entering. Wait for a BOS in the new direction after the CHoCH, then look for an entry on an Order Block or an FVG, with a defined stop and position size.
Frequently asked questions
What is a BOS (Break of Structure) in trading?
A Break of Structure (BOS) is a break of a prior high or low that CONFIRMS the current trend. In an uptrend, when price breaks above the last high, that is a bullish BOS: the trend continues. It is a continuation signal, not a reversal.
What is a CHoCH (Change of Character)?
A Change of Character (CHoCH) is the first sign of a trend reversal. In an uptrend, it is the break of the last higher low: the market changes behaviour and may flip bearish. The CHoCH is the alert; a BOS in the new direction is the confirmation.
What is the difference between BOS and CHoCH?
BOS confirms the existing trend (continuation); CHoCH signals a possible reversal (change of character). BOS = the trend continues; CHoCH = the trend may flip. In practice: in an uptrend, breaking a high is a BOS, breaking a low is a CHoCH.
How do you identify a BOS and a CHoCH on a chart?
1) Read the trend through the highs and lows (higher highs and higher lows in an uptrend). 2) Mark the last significant high and low. 3) If price breaks the last high in the trend direction, it is a BOS. 4) If price breaks the last low (in an uptrend) or the last high (in a downtrend), it is a CHoCH, the reversal alert.
Should you trade the CHoCH directly?
No, not on its own. A CHoCH is an alert, not an entry. Many traders wait for a BOS in the new direction to confirm the reversal, then look for an entry on an Order Block or a Fair Value Gap in that direction. Never trade a CHoCH without risk management.
Do BOS and CHoCH work in crypto?
Yes, and especially well: crypto is a highly trending, liquid market where market structure (BOS/CHoCH) is readable on BTC, ETH, SOL and large caps. As always, combine structure reading with liquidity, Order Blocks and real risk management.
⚠️ Educational content, not investment advice. Trading carries a risk of loss; you remain solely responsible for your decisions and risk management.