Order block is a market behavior that reveals the pile-up of orders by large entities. In forex, the order blocks are used by the banks to split their big orders into small chunks so that they get their orders filled at better prices without disturbing the market equilibrium. Order blocks are the same as supply and demand zones, but they are rare, and they can be applied to existing trading strategies as high probability setups. You can trade the breakout setups using order blocks. Order blocks are either bullish or bearish, and you can spot them at the end of a strong trend by marking low or high along with the swing high or swing low, respectively.