Glossary
What Is a Market Structure Shift (MSS) in Trading
A candle close beyond the last swing that led into the sweep: after lows are taken — above the last lower high. A wick does not count — it takes a body.
How it works
A Market Structure Shift (MSS) happens when price breaks the prior significant high (in a downtrend) or low (in an uptrend), breaking the sequence of lower highs or higher lows that defined the current trend. It's the first structural sign that the market may be changing direction.
You spot an MSS by marking swing highs and lows on the chart: first identify the sequence of consecutive highs and lows that make up the current trend, then watch for the moment price closes beyond the last significant extreme against that sequence. The shift alone doesn't guarantee a full reversal — it just flips the structure's status from trending to potentially reversing.
Traders use MSS as a reference point for looking for entries on a trend break, often combined with order block or fair value gap zones that price revisits after the shift. Without that combination, a single level break on its own remains a weak signal.
Example
In a downtrend, price makes lows at 98, 95, and 92. Price then rallies and closes above 98 — the prior local high before the 95 low. That's an MSS: the sequence of lower highs is broken, and the structure on this section of the chart has shifted.
Common mistake
A common mistake is calling any noticeable candle wick past a level an MSS, including false breaks on thin liquidity. Without a candle closing beyond the level, the signal is easily just noise.
Read next
Related terms
Frequently asked questions
- Does an MSS always lead to a full trend reversal?
- No, it's only a signal of a local structure change; the larger trend can resume after a short correction where the shift occurred.
- How is MSS different from breaking a resistance level?
- MSS is defined relative to the swing structure of a specific trend, not just any arbitrarily drawn level on the chart.
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