Confidence has been approached from several knowledge approaches where its main purpose has been to frame a form of behavior in human actions. On the other hand, welfare has had important repercussions in economic theories and from its subjective part with the behavioral sciences. However, the relationship between these concepts has not been addressed in a practical or conclusive manner even though there are premises that establish a natural relationship. This research aims to find out the role played by the fulfillment and non-fulfillment of expectations in confidence and how this affects the levels of welfare of individuals. For this purpose, the Mouse- Tracking methodology used for metacognition was implemented in an experiment that collects information on how individuals make decisions under expectation contexts created in a stock market simulation. The research found evidence where the interaction of confidence, fulfillment and non-fulfillment of expectations influences the welfare of individuals.