The evaluation of magnitude and orientation of horizontal stress in the earth crust is important for enhancing knowledge of in-situ rock stress that are useful for the design and analysis of underground structures. The evaluation serves as the first step in a stress analysis for a project site or for a region in consideration. Hence, the aim of this manuscript is to analyze the measured maximum horizontal in-situ rock stress with respect to theoretical trajectories of lateral plate boundary forces. To do so, the authors use parameters of relative motion between two adjacent tectonic plates and check the statistical goodness-of-fit of observed global stress data adjacent to the plate boundaries. The authors will also check the measured stress data in Norway with the same model. It is believed that this will collectively contribute to refining the best estimate of stress orientation and establishment of best estimate stress model (BESM). The knowledge of the orientation and magnitude of regional/first-order tectonic stress will then be used in the research to fix the boundary condition in the final in-situ rock stress model (FRSM).