📐BOS vs. CHoCH: How 40 pips decide if a trend lives or dies
Market structure (2/12): BOS vs. CHoCH — how to know if a trend is still alive or just dying
You're sitting at the EUR/USD chart, the price is nicely rising, you're finally up by 40 pips, and suddenly one quick candle drops down. In your head, you think: "Did it reverse? Or is it just a correction?" You close the position, breathe a sigh of relief — and the market shoots up another 80 pips without you within an hour. Sound familiar? The difference between whether it was a BOS (continuation of the trend) or CHoCH (change of character) would have told you much more than your panic at that moment.
In the first part, we dissected candlestick anatomy. Today, we go a level higher — to market structure, which is the backbone of all chart reading without indicators.
Market structure in three sentences
The market doesn't move straight, but in waves. When it paints higher highs and higher lows, it's descriptively an uptrend. When it makes lower highs and lower lows, it's a downtrend. And when it jumps up and down in a range without a clear shift — it's a range (sideways).
The magic is that the market itself tells you what phase it's in. Just watch whether the last significant high/low holds or breaks.
A small note on origin: the terms BOS and CHoCH in this form were popularized by modern methodologies like SMC and ICT. However, we take them generically — as general names for market geometry that traders described long before, not as the holy grail of any particular "course."
BOS: the trend says "I'm continuing"
Break of Structure (BOS) = breaking the last significant high (in an uptrend) or low (in a downtrend) in the direction of the trend.
Imagine an uptrend:
- Low A at 1.0800
- High B at 1.0850
- Correction to low C at 1.0820 (higher low than A ✅)
- Price rises again and breaks 1.0850 → that's BOS.
Breaking high B confirms that buyers are still in control and the structure of higher highs/lows continues. BOS isn't a signal of "something new" — it's a stamp on what's already running. Ideally, you want the price to close beyond the level with the body of the candle, not just flicker with a wick.
Similarly, in a downtrend: breaking the last significant low downwards = BOS on the short side.
CHoCH: the first warning that something is breaking
Change of Character (CHoCH) = the first break of structure AGAINST the current trend.
Let's stay in the uptrend from the example above:
- Low C was at 1.0820
- Price rises to a new high D at 1.0880
- Then it falls and breaks down below 1.0820 (the last significant higher low)
Here, something happened for the first time that an uptrend "isn't supposed to do" — the price broke the structure of rising lows. This is CHoCH: the first warning that the character of the movement might be changing from rising to falling.
Note the word might. CHoCH isn't a confirmed reversal. It's a change of character, not automatically a new trend. A reversal is confirmed only when a new structure in the opposite direction (lower high + BOS down) follows CHoCH.
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