Trading in yobit is different with day trading of bitcoin in the exchanges.In yobit you can do altcoins trading where you buy and sell altcoins with bitcoins whereas day trading is buying and selling bitcoins only with price is fiat currency and best place for that is localbitcoins.
Well i think he wanted to know about altcoin trading. So thing you have to do is to check prices of some altcoins you want, and when one drops just buy some of it
not that simple,if you just lurking on the current price and always waiting for the right time then you can't maximize your profit,you need to do an analyzation so you can predict which one of rising or falling that will be eventually happen to the price of altcoins