Je was op zoek naar: 自行决定追加保证金 (Chinees (Vereenvoudigd) - Engels)

7.4 您还应认识到，我方有权根据《用户协议》自行决定追加保证金。
7.4 you should also be aware that under our user agreement we are entitled, at our sole discretion, to make a margin call.

3. 上诉法庭自行决定其权限。
3. the appeals tribunal shall decide upon its own competence.