Regarding the legitimacy of BT Markets forex brokers, it provides CYSEC and WikiBit, (also has a graphic survey regarding security).
Business
License
The regulatory license is the strongest proof.
CYSEC Forex Execution License (STP)
Cyprus Securities and Exchange Commission
Cyprus Securities and Exchange Commission
Current Status:
License Type:
Forex Execution License (STP)Licensed Entity:
Effective Date:
2017-09-25Email Address of Licensed Institution:
info@lirunex.euSharing Status:
No SharingWebsite of Licensed Institution:
www.lirunex.eu, www.lxprime.euExpiration Time:
--Address of Licensed Institution:
Phone Number of Licensed Institution:
+357 24 694 888Licensed Institution Certified Documents:
The latest exposure and evaluation content of BT Markets brokers.

Whether it is a legitimate broker to see if the market is regulated; start investing in Forex App whether it is safe or a scam, check whether there is a license.
BT Markets latest industry rating score is 1.50, the higher the score the safer it is out of 10, the more regulatory licenses the more legitimate it is. 1.50 If the score is too low, there is a risk of being scammed, please pay attention to the choice to avoid.