The FOREX system is a worldwide currency trading platform. Successful trading depends on good traders' awareness and experience and estimation of the situation. The paper deals with the synthesis of computer programs for the prediction of values and the trend of currency exchange rate trends, the analysis of the status and development of candlestick charts, and the recommendations for the trader's activity. The next section is devoted to software to determine the characteristics of a potential business partner. Both mathematical and fuzzy-logic models are used to support decision-making.