I am starting trading some month ago.Bought some alta coin but now all alta coin are down and i donot understad what can i do?I get a big lose if i sell this.So how control my mind ? 
There are two ways to handle that kind of situation. First, keep buying the coins that you have until you can get the average amount then sell it. And second, cut-loss, stop your losses and find another coin to trade to.
if i want to use to stop loss on yobit, would i stop it manually?