It is not illegal to post two futures accounts at the same time. Futures trading needs to comply with relevant laws and regulations and compliance regulations. If two futures accounts are legally registered and held by the same person, it is not illegal to log in at the same time. However, if someone else provides help or uses illegal means to obtain another account, then this behavior may be regarded as illegal, depending on local laws and regulations. When conducting futures trading, it is recommended to abide by relevant regulations, maintain the authenticity and confidentiality of identity information, and avoid illegal acts.