Thanks guys for anwers, I was thinking about the solution where I would have access to my friends/(maybe clients in the future) founds on exchanges, but they would be the only ones that can withdraw the funds. I think what GreatArkansas wrote about API sounds good. (though mostly i go for Binance)
Probably would be better off i'm just able to trade on their accounts from one place (no direct access to their exchange accounts).
Not much clear here.
You are saying, you will have account details of the exchanges (let's say Binance exchange) of your friends, and you will have a piece of software. When you will execute a trade in the software (bot), the same trade will be placed in all the accounts?
Please clarify.
Yes, exactly