How does most Forex options work? What is the most liquid or popular type of forex options?

External question — Quantitative Finance Stack Exchange Author: High GPA Original post: https://quant.stackexchange.com/questions/55491 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. For the "mainstream" forex options for example those (in the size of bn) posted on this site: https://www.forexlive.com/orders/!/fx-option-expiries-for-thursday-july-02-at-the-10am-ny-cut-20200702 Do you know what type of forex options are posted in that site? Is it European option? American option? Barrier options? Others?