Order block

An order block is the last opposing candle before a strong, structure-breaking move, treated as a zone where institutional orders entered the market.

A bullish order block is the last down-candle before a sharp rally; a bearish one is the last up-candle before a sharp drop. Traders expect price to return to and react from these zones. Order blocks are a core SMC/ICT concept and are often paired with fair value gaps.