Welcome! By signing up for a new account, you are creating a trading account in the Geton Investments Order-Book structure. If you use a referral link, you will position your New Account in their order-book structure. Otherwise, your account will be a "first-level" account directly to Trading Pool, without an upper order-book structure. Repositioning inside the order-book structure is impossible, but you can always create a New Account using a different email and MetaMask address.