I opened an account for indices and now I want to use the same account to trade forex. Is that accepted?

I opened an account for indices and now I want to use the same account to trade forex. Is that accepted?    

https://rcebanque.com/    

RCE Banque is not a licensed or regulated broker even though it states offers that look good to be true. 

RCE Banque claims to be operated by BRIDGEWATER ASSOCIATES (UK) LIMITED, a company registered in the United Kingdom with registration number 05501112. So we searched in the  Companies House of United Kingdom (CH), the United Kingdom's registrar of companies, and found the company. But CH has no legit rights to regulate any forex activities. Having registration does not mean having any regulation.

As per United Kingdom law, almost all firms and individuals offering, promoting, or selling financial services or products in the UK shall be authorized by the United Kingdom Financial Conduct Authority (FCA). However, we did not find any matching results for this broker in FCA.

Moreover, Cyprus Securities and Exchange Commission (CySEC) issued a warning that RCE Banque did not belong to an entity that has been granted authorization for the provision of investment services. You can check the full warning from here.

The truth is, RCE Banque is not overseen by any regulators. That means your personal data or your funds in this broker are unsafe and cannot be protected by any law. We would recommend traders stay away from unregulated brokers like RCE Banque and trade with licensed brokers.