Breaker Block

Definition

A breaker block in ICT methodology is a previously-valid order block that has been violated by price (closed beyond it) but whose role then reverses — a former bullish order block that's broken downward becomes a bearish breaker, expected to act as resistance on subsequent revisits. The concept models how 'failed support becomes resistance' in classical technical analysis but with stricter ICT-specific rules around what qualifies. Breaker block detection requires tracking order block invalidation events and is moderately codable in EAs, though the reliability of breaker reactions is more debated than original order blocks.