I like to keep it simple. Look for historical highs and lows, set your levels, buy high, sell low! For all the newbies to trading, keep it simple, buy high, sell low! don't think too much about it 
This is effective on trading strategy where in you can earn more just making sure of your every moves.
Be wise on buy and selling or trading especially coins, make sure that you are not that in less estate of pricing it.
but sometimes we can not predict that the price of coin will growing up or goes down. it is very hard for someone who newbies in trading.
Honestly reading only historical highs and lows does not help in predicting stocks prices, being updated on news (good or bad) will help you to predict the next movement of the price of your stocks. But if you combine reading of historical highs and lows with the event that happen during those time, you will have a better chance of predicting the movement of price correctly.
Example: Your holding have a positive news about certain group will adopt or use those stocks, correlating the previous news and the movement of price of your holdings will give you an idea of possible trend of its price.