You need to be aware and buy on every dip, sell with 5-10% profit and buy again. This is quite difficult and very nervous. I won't suggest doing this if you are a newbie - you will lost all your money
On red market don't sell while you're not gaining good profit from your invested coin for trading, much better to good coins and hold it longer terms. Others did some day trading, but most of them were losing and not earning high returns. Keep that idea of having patience while in red market so that you'll going to achieve an assurance for good trading capability.