Hello I would like to know what the difference is between m_exchange and m_primaryExch in the Contract class in the Interactive Brokers' Java API ? Moreover, where can I find all the possible values that can be used to fill these fields when building an instance of the Contract class? Furthermore, where I could see all the possible and valid values for the field m_currency? I asked because I did not find it in http://www.interactivebrokers.com/php/apiUsersGuide/apiguide.htm Thanks in advance