Break of structure versus a liquidity sweep
A break of structure (BOS) closes beyond a swing and continues with acceptance on the next candles. A liquidity sweep pierces the same level, then returns inside the prior range, leaving trapped stops and little follow-through.
On the four-hour frame we ask students to wait for a closing break, then check whether the next candle holds outside the swing. If price reclaims the level quickly, log it as a sweep and keep the prior structure intact.
This distinction matters more than naming conventions. Miscalling sweeps as BOS is one of the fastest ways to flip bias every session.