Specific time windows during trading sessions where institutional order flow creates the highest-probability trading setups. Term popularized by ICT methodology.
The main kill zones are: Asian Kill Zone (00:00-04:00 UTC) for USD/JPY and AUD/USD, London Kill Zone (07:00-10:00 UTC) for EUR and GBP pairs, New York Kill Zone (12:00-15:00 UTC) for all majors and indices, and London Close Kill Zone (15:00-16:00 UTC) for reversals. Trading exclusively during kill zones can significantly improve win rates by aligning with institutional activity patterns.