Once you have deposited funds to your account, and the funds are confirmed by the network, you are now able to exchange them for Etho Protocol on the exchange. In this case, we will be using BTC as an example, as BTC-ETHO is the main trading pair for Etho Protocol on STEX, so in order to trade other altcoins for Etho Protocol, you will need to first convert them into Bitcoin, and then trade the bitcoin for Etho Protocol.