The learning mechanisms that are innate in financial markets are reflected in the influence of a small range of natural mathematical ratios. These ratios provide a critical link between rapidly developing financial market oscillations and slowly evolving fundamental trends. They therefore provide clearly-defined decision-making zones relating contra-trend corrections to underlying trends. The presentation will show why these decision-making zones emerge and how they can be calculated. If you recognise the ranked importance of these zones, you can determine the strength of your response to them.