What is the most difficult thing in trading?

Many people think the most difficult thing in trading is technology, but that's not actually the case. The real difficulty is that when an opportunity you've waited for a long time finally appears before you, you can enter the market without hesitation and execute what you should be doing at that moment. How the market will move in the future can only be known once the price action plays out. When you're wrong, you cut losses and exit; when you're right, you hold to your target. Entering without doubt, holding without fear—this kind of iron discipline and execution ability is often more difficult than technical skills!