simple method: Greed, excitement, euphoria, panic, or fear, should not be included in the traders' calculations. Excessive emotions can cause massive losses. This is where a trader must be able to avoid negative emotions in him.
Panic traders is always correct also if they gain extra money from their coins its better to sell early than loss for 50% of your investment it is very hard to predict prices if they don't have control the market.
It might be hard for you to predict the market just because of your knowledge of crypto currency trading but to some people is not that hard for them to predict the market trend.