For many active traders, speed is key when placing a big order to make sure the entire position is bought or sold at the same price. To make sure that happens, they’ll tell the brokerage to make it a “fill or kill” order.

In this guide, we'll explain what a fill or kill order is, how it works, and what sets it apart from similar order types. Table of Contents

Overview: What is a Fill or Kill Order?

How Fill or Kill Orders Work

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Overview: What is a Fill or Kill Order?

Time is an important factor when placing a trade through a broker or an electronic trading platform. Larger orders can take longer to fulfill, and during that time, prices can fluctuate, especially in a volatile market.

A fill or kill order (FOK) is a conditional time-in-for

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