Common comparison error
An expiry duration and chart interval remain different even when both show the same minutes around Observation window and Barrier.
GlossaryPricing & settlement
Observation window
The period during which a touch, no-touch, stay, or barrier condition is monitored. Some contracts observe the full path, while others use only the final price.
Practical use
How to verify Observation window
Read Observation window together with Expiry-only observation, Barrier, Barrier breach. The comparison must preserve the exact rule, value, state, and evidence described below.
A neutral example
An end-of-day Observation window names 16:00 New York. Venue close, auction calculation, broker settlement, and Expiry only observation are recorded separately. The scenario is specific to Observation window: start, end, sampling, outage, and path rules determine which price movements count.
Evidence path
Where to verify Observation window
Use the source that governs the exact contract, account, entity, or platform state. A general definition cannot replace current broker terms.