If you are worried, you can apply for a simulated account first and get familiar with the on-site trading. Now the general trading platform can do it.
You should understand that foreign exchange comes from international trade settlement, and currency exchange requires the direct participation of banks. Therefore, banks participate in the final settlement of foreign exchange, participate in hedging and provide quotation guidance. As for the stock index futures, it is in the futures exchange, just like the Shanghai and Shenzhen 300 stock index futures in China stock market, but within the scope of the exchange, market participants (institutional fund managers, individual retail investors, large investment banks and brokers, etc.). ) make a settlement between them, which has nothing to do with the bank. At most, the final profit and loss needs to be transferred to their respective trading accounts through banks. Since it is futures, there must be trading time for settlement, and the exchange will force the liquidation at maturity, whether it is a loss or a profit.