Considering various market models in the work helps clarify the understanding of the current market situation. Paying attention to a narrower area, namely the oligopoly model, requires introducing specific indices to simplify the analysis of market structures, as well as applying theoretical developments in practice. When introducing concepts such as the Lerner index and the Herfindahl-Hirschman index, it is impossible to consider them separately in isolation from the real market situation and the emerging relationships between indicators and organizations. By applying abstract theoretical developments in current real enterprises, it becomes possible to test existing models in a modern economy to solve management problems. The article presents calculations within the model’s framework using the example of an operating enterprise, along with relevant conclusions.