I think you should have the best strategy depending on the altcoin you invest. If you want to make big profits, you have to have big capital to make the most profit in the day. I think you should focus on investing in top altcoin on  great coinmarketcap for day trading. The market is going down so do not choose to invest in altcoin with small oscillation fluctuations, hard to earn big profits.

i think it will be very helpful for newbies try to trade manually and use trading bots in parallel. I can advise you cryptohopper and tradesanta.com.