Forex glossary

One Triggers Other (OTO) in Forex

A clear definition of One Triggers Other (OTO), with practical context for reading markets and making better trading decisions.

Level 2 · From Prices to PracticeOrders & execution

Definition

A One Triggers Other (OTO) instruction links orders so that execution of a primary order activates one or more secondary orders. The later order does not become active until the first condition is satisfied.

How It Works

Orders are instructions, and their exact behavior depends on the conditions attached to them: price, quantity, timing, and what should happen if execution is only partly available. Before confirming an order, read the order type and validity fields rather than assuming every instruction behaves like a market order.

Why It Matters

This matters because two orders aimed at the same market can produce very different outcomes. Level 2 treats order mechanics as a safety skill: configure the instruction you actually intend, then review it before submission.

Key Takeaway

A One Triggers Other (OTO) instruction links orders so that execution of a primary order activates one or more secondary orders.

Practical forex example

A buy limit is the primary order. Once it fills, the platform automatically activates a separate protective stop that had been stored as the secondary OTO instruction.

Why One Triggers Other (OTO) matters

Understanding One Triggers Other (OTO) helps traders interpret market information, plan decisions, and manage risk with more context.

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