Market structure (BOS and CHoCH)

Market structure is the order of the highs and lows on a chart. In an uptrend each high is above the last and each low is above the last: higher highs and higher lows. In a downtrend both step lower. As long as that sequence holds, the trend is intact.

Reading it needs no indicator. You only mark the clear turning points: the highs and lows where price reversed. Small wiggles in between don't change the structure; the points that count are separated by a clear pullback.

Two abbreviations name the sequence. BOS (break of structure) is price breaking the last high or low in the direction of the trend: a new higher high in an uptrend, the structure continuing. CHoCH (change of character) is the first break the other way: in an uptrend, the last higher low giving way, the first sign the trend is starting to crack.

Mark the turning points first. Say EUR/USD climbs from 1.0790 to 1.0832, pulls back to 1.0808, then rises to 1.0851. The highs are 1.0832 and 1.0851, the low between them 1.0808. When price closed above 1.0832, that was a BOS: the uptrend structure continues.

Now find the level that would break the trend. In an uptrend it's the last higher low, here 1.0808. If price closes below it with a body, you see a CHoCH: buyers have lost the last place they defended. One CHoCH doesn't prove the trend has turned, but there's no longer a reason to look for buys in the uptrend.

Always count the break on a close. A candle whose wick dips under 1.0808 but closes above it doesn't break the structure; often it's a move that sweeps the stops below that low and turns back. If price then breaks the last high, a widely watched setup appears: liquidity taken first, then structure broken upward.

The stop logic comes from the structure too. Someone buying in an uptrend puts the stop under the last higher low, because a break there invalidates the uptrend idea. With an entry at 1.0820 and the last low at 1.0808, the stop sits near 1.0805, a risk of 15 pips; that distance is your 1R.

Treating every small swing as structure. On a 5-minute chart a little high and low forms every few candles. Mark them all and you'll see a BOS every hour and a CHoCH every half hour, and you'll keep changing your mind. Look for turning points separated by clear pullbacks.

Mixing up timeframes. A CHoCH on the small chart may be nothing more than a pullback on the big one. Selling a 5-minute downtrend structure while the 4-hour chart keeps printing higher highs means swimming against the main current.

Chasing the break. The BOS candle is often long. Entering at its tip with the stop under the last low makes the distance large. The more common approach is to wait for the pullback after the break.

In a sideways market with no clear direction, structure reading is weak. While price swings inside a range, highs and lows keep breaking each other; each looks like a BOS or a CHoCH, and none of them points anywhere.

Around major news the structure can change completely within a few candles. When data is released, price can clear earlier turning points in a single candle; that move may start a new structure, or it may be a reaction that's fully taken back minutes later.

Check the room ahead too. If the structure broke upward but strong resistance sits right above, there isn't much space. A trade with a 15-pip stop that runs into resistance 10 pips higher doesn't pay 1R even on paper.