Common comparison error
Similar barrier names do not establish identical Double barrier payoff, window, frequency, refund, or Ends between ends outside.
GlossaryProducts & contracts
Double barrier
Two price levels that define an upper and lower boundary for an In/Out or range contract. Check whether settlement uses only the final price or the full path before expiry.
Practical use
How to verify Double barrier
Read Double barrier together with Range option, Ends Between/Ends Outside, Higher/Lower. The comparison must preserve the exact rule, value, state, and evidence described below.
A neutral example
Two levels in Double barrier sit at unequal distances from spot. Tickets retain distance, time, payout, and Range option so the geometry remains comparable. The evidence must resolve the defining Double barrier boundary: upper and lower levels define a range whose outcome can depend on final price or the entire path.
Evidence path
Where to verify Double barrier
Use the source that governs the exact contract, account, entity, or platform state. A general definition cannot replace current broker terms.