You can trade multiple test accounts simultaneously and copy trading is allowed. Additionally, it's possible to trade your PRO accounts alongside your test accounts using copy trading. You can have up to three active PRO/PRO+ accounts at the same time, and they can also be traded simultaneously. Please note that the limit of three active PRO/PRO+ accounts applies to the total number of accounts, not three accounts in each category. For example, you can have two PRO accounts and one PRO+ account, but not three PRO accounts and three PRO+ accounts simultaneously.