Yes, you are indeed able to implement and use an Expert Advisor, whether you use a third party one or your own.

However, we also must inform you that FriedbergDirect powered by AvaTrade is not able to take responsibility of, nor be held liable for any issue arising from or encountered with any Expert Advisor you implement on your account; it is solely the responsibility of the account holder.

We take no responsibility for the functioning, effectiveness, maintenance or the results of any external or third-party EA's or any customer-created EA's.