Metal X is a cryptocurrency exchange which supports 10 cryptos with 15 trading pairs. It charges you 0.0004btc as withdrawal fees and 0.25% for taker while 0.20% for maker as trading fees, it doesn't allow fiat deposits except cryptos and it permits US investors.
It offers you safety of your assets with competitively reducing fees the more you trade and rebates for high volume accounts.
It has a simple to use intuitive interface for your enjoyment, it accommodates any experience level with a referral reward system.
Metal X may soon be no more in existence and I hereby submit that you should kindly take caution.