What is the fee charged for exchanging currencies?

Excuse me, could you please clarify what the fee structure is for exchanging currencies within your platform? I'm particularly interested in knowing if there are any hidden costs or variable rates that I should be aware of. Additionally, how does your fee compare to other cryptocurrency exchanges in the market? Is there a specific fee schedule for different types of currency pairs, or is it a flat rate across the board? Your insights would be greatly appreciated.