Regional Preferences

Agent Merina

Agent Merina

Dedicated Support Agent • Online
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Orders

Fill-or-Kill (FOK)

An order that must be executed immediately and completely, or not at all. This is part of the mechanical toolkit traders rely on to control entries and exits with precision rather than reacting to price in real time.

Meaning

What Fill-or-Kill (FOK) means

An order that must be executed immediately and completely, or not at all. This is part of the mechanical toolkit traders rely on to control entries and exits with precision rather than reacting to price in real time.

Trading context

Why it matters

It's used when partial fills are unacceptable, often in larger institutional trades. This is the kind of nuance that separates experienced market participants from beginners, since it only becomes practically useful once the basics are second nature.

Example

How traders may see it

Rejected instantly if full size can't be filled at the requested price. In practice, traders typically encounter this directly within their trading platform, charting software, or an economic calendar, depending on the specific context in which it arises.