Adeyemi, R. A.Oyeyemi, G. M.2023-07-192023-07-192008International Journal of Pure & Applied Sciencehttps://uilspace.unilorin.edu.ng/handle/20.500.12484/11580Real world problems are described by non-linear and chaotic processes, which makes them hard to model and predict. The aim of this paper is to determine the structure and weights of a time series model using genetic algorithm (GA). The paper first describes the traditional procedure of estimating time series models, which are commonly used in financial forecasting. These traditional estimation methods may not be adequate enough to capture stochastic nature of the financial due to its complexity. This article gives a brief background of Genetic algorithm method and its estimation procedure. This approach was later applied to model the Naira exchange rates against other currencies and it yielded a mean square error of 0.0058, 0.00799, 0.03711, 1.212 and 0.1108 for U.S dollars, British Pound, Jopanese Yen, CFA franc and Swiss franc respectivelyenGenetic algorithm, Mean square error, Variation criterion, Exchange rateArticle