Are there any fees when trading?

Yes, there are 2 different fees that can be incurred when trading - Trading fee when you open/close a position and Overnight financing. 

Overnight Financing is incurred any time a position is carried into a new trading day, at 0:00 UTC. Positions closed before the start of a new trading day (0:00 UTC) will not be charged at all.

Formulas：

• Trading Fee(Open/Close a position) = Margin * leverage * 0.05%
• Overnight Financing = Margin * leverage * 0.05%