Orders & execution
What is a One-Triggers-a-One (OTO) conditional order sequence?
By Easy Money Scanner · Educational reference · Not investment advice
The short answer
A One-Triggers-a-One (OTO) order links two orders so that the execution of the first (primary) order automatically activates submission of the second (secondary) order.
How it works
OTO sequences are useful for automating follow-up actions, such as triggering a stop-loss or profit target only after an initial entry order actually fills, avoiding orphaned exit orders.
An example
A trader sets an OTO where a buy limit order, once filled, automatically triggers submission of a trailing stop-loss order on the newly acquired position.
Risk & limitations
If the primary order never fills, the secondary order never activates, so traders must still monitor whether intended protective orders are actually in place.
Examples are hypothetical, not trade recommendations. US contract and regulatory references do not automatically apply in Canada. Rules, margin requirements and broker policies can change; confirm them with the relevant authority and your broker.