A Market Structure Shift (MSS) is confirmed when price closes — not just wicks — beyond the most recent opposing swing point in the current trend. In a bearish trend making lower highs and lower lows, an MSS occurs when price closes above the most recent lower high, signaling the downtrend may be reversing.
In ICT methodology, an MSS is distinct from a Break of Structure (BOS). A BOS is a continuation signal — price breaks the most recent swing in the direction of the prevailing trend. An MSS is a reversal signal — price breaks against the trend, often after a liquidity sweep of the previous extreme low or high.
The MSS is most meaningful when it occurs in a premium or discount zone (Fibonacci 61.8–79% of a swing), after a liquidity sweep, and when a Fair Value Gap is left in the impulse that caused the shift. This confluence is the foundation of many ICT precision entry models.
Logging MSS trades in your journal with the higher timeframe (HTF) trend context, the liquidity swept before the MSS, and the lower timeframe (LTF) confirmation will build a data-driven picture of when your MSS setups have the highest win rate and R-multiple.