From my experience, I guess the best way to avoid online scam is by having a very thorough investigation about the subject matter. If i had this advice i would probably have not gone through the ordeal i went through some months past. Binary Options is a blessing to some and curse to many, it almost ruined me. Gracefully, i got in contact with a certified recovery specialist ( Mr Tessy ) who helped me with refunds. I can’t say for any other recovery expert but this ( Mr Tessy ) came to my rescue and I RECOMMEND ONLY his service. 
Contact their support team for further assistance:
HQRECOVERY22 at GMAIL dot COM
Thank me later.