Most technical analysts and technical traders spend a lot of time observing and trying to recognise chart patterns in order to make market forecasts. But who knows how a pattern is recognised by our minds? The purpose of the presentation is to deal with this recognition process. How do our minds analyse different shapes? The understanding of pattern recognition mechanisms will be based on the main principles of a psychological methodology called “Gestalt Theorie.” Thanks to this we will understand why chart interpretation is definitely subjective and we will discover ways to benefit from this knowledge.