Common comparison error
A final price inside a range does not prove Barrier breach success when the full path or Settlement price is monitored.
GlossaryPricing & settlement
Barrier breach
A recorded event in which price touches or crosses a barrier under the contract rule. The contract terms define whether touching, crossing, bid/ask pricing, or another condition counts.
Practical use
How to verify Barrier breach
Read Barrier breach together with Observation window, Settlement price, At-the-money settlement rule. The comparison must preserve the exact rule, value, state, and evidence described below.
A neutral example
A Barrier breach ticket settles from final price while Observation window monitors the full path. The example crosses a boundary and returns before expiry. The evidence must resolve the defining Barrier breach boundary: a touch, cross, sampled observation, or stored-price event counts only under the contract's trigger wording.
Evidence path
Where to verify Barrier breach
Use the source that governs the exact contract, account, entity, or platform state. A general definition cannot replace current broker terms.