GrahamAlpha.com Review

ADVICE: Stay completely away. GA is a referral broker from ToolsTrade.com a signals provider. Their rep/client advisor will phone continually requesting more funds. Funds are sent via bitcoin-currency transfer apps as go-between agents. They use AnyDesk remote access to the agents to signup to them and view your bank account. On request for a withdraw, requests are auto-cancelled unless bank swift transfer info is sent. But on doing so are ignored. Provision for bank info on their site has only just been made after over a year without it.
Their T&Cs state that chargebacks are not allowed. For large amounts the only way forward to complain of fraud to you bank, who may involve the UK FSCS

Jan 12, 2021 - 1 Star Takes control of your desktop using Anydesk and demands funds over and above your personal risk limit [as advised by all pro trading advisors] On request for withdrawal, nothing is ever done or answered. Its not known if anyone has ever got paid from them!

Stay away.
You would be asked to pay a commission after supposedly successful trade.
So if your trade is successful it's not good for you as you'll have to find 20% to deposit and without any guarantee that you will get your capital back.