My card was charged twice by Nord Financial Services Ltd. dba Nexma.pro on the same day. I had to dispute it with my bank. Nord Financial Services Ltd. dba Nexma.pro then froze my account and said I had a negative balance because of the chargeback. They created the problem and then punished me for it.
Pros: Competitive fees|Portfolio tracking tools|Fast execution|Customizable dashboard
Cons: No integrated tax optimization