In order to trading, we must look at how much a coin decreases and increases and within what range this coin is moving in the market. We have to buy that coin after coming within a minimum range. And when everyone starts buying this coin, the coin will suddenly go up and you have to sell it at that time. This way you can easily get 10 to 20 percent profit.
Trading is bigger than looking at when a coin decreases or increases and buying low; you do not invest because the value is low alone; you invest because the value is low and it has a better chances of being worth much more in the near future. Near future could be few days, weeks, etc. You do not gamble your way to trading and take profits; it is a very risky way. Do your research and figure it all out before investing.