Big Joe is a retail trader trying to move 1-2 lots. His order can be entirely filled at a single exchange. Changing standing orders on other markets is only an

Big Joe is a retail trader trying to move 1-2 lots. His order can be entirely filled at a single exchange. Changing standing orders on other markets is only an issue for big players trying to move many lots. You are correct that the financial markets are complex and I can't possible cover every topic. Even if I had the stamina I don't have the knowledge.