How much does Coinmetro charge for trading?

I'm curious to know, could you elaborate on the trading fees that Coinmetro imposes on its users? Are there any specific charges for buying and selling cryptocurrencies on the platform, or do they vary depending on the type of asset or the trading volume? Additionally, are there any other hidden costs or fees that traders should be aware of when utilizing Coinmetro's services? It would be great to get a clear understanding of the overall cost structure associated with trading on the platform.