1. orderer: the futures company will only accept orders from people who place trading orders. Who do you write in the contract? You can designate one person or several people as the sender of your order. This orderer is usually your broker, and the futures company also accepts the customer's own instructions by default.
2. Transferor of funds: Generally, the person who transfers (transfers) funds is the customer himself, unless you entrust the authority to others. But now the funds are all transferred from the bank to your futures account and from the futures account to your bank account, so there is basically no risk, because the bank account is still under your control (unless you give your passbook and password to others, it has nothing to do with the futures company).
3. Confirming person of the statement: the person who confirms the transaction result, that is, the signatory of the statement. If you entrust a broker to make a bill, the broker can be a "statement checker". As long as he passes the examination, it means that you have passed the examination.
For example, if you indicate in the contract that "A" is your orderer, and one day this person places an order, causing losses, you will not recognize this person's order and say to the futures company, "I didn't place such a transaction order, so the result is invalid." If the futures company files a lawsuit with you, you are sure to lose. Because you designated this person as the "orderer", the futures company recognized this person's order.
Similarly, if the futures company accepts the trading instructions issued by others (you didn't specify them), then you have reason not to recognize the corresponding trading results.