Each account size has a limited number of contracts you are allowed to buy or sell at any given time.
For Starter and Starter Plus Plans:
For a $50,000 account, the maximum allowed size is 3 E-Mini Contracts.
For a $100,000 account, the maximum allowed size is 6 E-Mini Contracts.
For a $150,000 account, the maximum allowed size is 9 E-Mini Contracts.
Please note that the Starter Plan has 1:10 scaling for micro contracts, while the Starter Plus Plan offers a 1:5 scaling.
For Expert Plan:
For a $50,000 account, the maximum allowed size is 5 E-Mini Contracts or 5 micro contracts.
For a $100,000 account, the maximum allowed size is 10 E-Mini Contracts or 10 micro contracts.
For a $150,000 account, the maximum allowed size is 15 E-Mini Contracts or 15 micro contracts.
For Milestone Plan:
For a $25,000 account, the maximum allowed size is 1 E-Mini Contract or 10 micro contracts.
For a $50,000 account, the maximum allowed size is 3 E-Mini Contracts or 9 micro contracts.
For a $100,000 account, the maximum allowed size is 6 E-Mini Contracts or 18 micro contracts.
For a $150,000 account, the maximum allowed size is 9 E-Mini Contracts or 27 micro contracts.