Start with product scope
Check whether the current plan and account model support the number of MT accounts you want to manage, and do not assume every copier routes one signal to every account.
Separate account rules
Each account can have different risk needs. Review lot sizing, allowed symbols, channel rules, and pause controls before scaling signal copying.
Review account-level history
A multi-account workflow should make it clear which account received a signal, which account skipped it, and why.