The troubles in trading often do not come directly from the market, but from the gap between expectations and reality. Earnings stories, sharing with others and self-evaluation will create excessive expectations, and the emotional chain after failure will lead to eager to recover or overly conservative decisions. This article analyzes the sources of expectations and how gaps interfere with judgment, and explains the calibration method of measuring performance on a long-term scale and basing expectations on one's own data, helping traders manage the sources of emotions and focus on executing plans.