My friend loves opening different trades at a time, most at times is difficult for him to control what's should be. Trading on free chart with multiple opening can be very dangerous. Yesterday he experience unusual hit when bitcoin price drops again, four trades loss at once when the market go against him. Personally I don't advise multiple trade especially when you're not familiar with trade
One at a time is advisable and it is more manageable than having multiple trades which makes you out of focus and priority.
If really wanted to do this, might having trading bots help it out but knows the consequences as well - higher chances of losing than profit. I'm not sure if this strategy is a kind of greediness or not but for me, that was impossible to work so well. Yes, the results are possibly disappointing that nobody wants to have it. Have to make it real, our mind doesn't function that fast and like a robot.