One-cancels-the-other: two linked orders where filling either one automatically cancels the other.
Last verified 13 September 2026 · written by the DexLadder team
What it means
One-cancels-the-other: two linked orders where filling either one automatically cancels the other.
Why it matters when you trade
OCO is the mechanical form of "I know where I am wrong and where I am done". It brackets a live position with a stop and a target, so neither hesitation nor a dropped connection can leave one leg orphaned. Without linkage, a filled take-profit leaves a naked stop that can later open an accidental short, which is a surprisingly common way to lose money while technically being right.
Worked example
Long at 100 with an OCO: stop 94, target 118. Price prints 118, the target fills, the 94 stop is cancelled in the same instant.
See it on live markets
DexLadder runs oco order against live market and pool data, with simulated capital, so you can watch it act on an order instead of reading about it — no account, no wallet, nothing installed.