There are few factors that leads to unfavourable trading, these factors includes Greed, and chasing a trend, Traders are expected to encounter Challenges during trading and relating these challenges with people's experiences can be the key in solving the challenge,
Sticking to the trading plan is also good to avoid unfavourable trade as changing plans in the middle of a trade Can really lead to a loss in trade.
This is too common to many people they fall prey to Greed. Greed is the worst enemy of humans but those who set their goals when to book profit can easily overcome greed. In my own opinion when you open any trade set your hit points and when the price hits your planned goals book some profit and book some more when the price hits another goal in this way you can overcome greed. It is a challenge for the traders to have the best control over their own greed.