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Order execution Meaning

The actual completion of a buy or sell order. It is the moment the asset changes hands.

Execution can be partial (only half the order filled) or full. In DeFi, execution is atomic.

The trade either happens completely or fails completely; there is no "partial fill" left in limbo. In CEXs (Centralized Exchanges), partial fills are common.

Traders care about the speed and certainty of execution. "Rejected execution" is a frustrating error during high traffic, where the exchange refuses the order because the price moved too fast.

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