Contradistinction before and after the NAFF stability analysis on the MCMC fitting results. Green hollow histograms: the posterior distribution of MCMC RV fitting parameters before stability analysis. Purple filled histograms: the posterior distribution of RV fitting parameters for both planets in TOI-4633 system with the condition of i_mut = 20° and the constraints of NAFF stability threshold shrink the range of both (K₁, e₁) and (K₂, e₂). Note: secosω1 = ﹩\sqrt{{e}_{1}}﹩cosω₁, sesinω1 = ﹩\sqrt{{e}_{1}}﹩sinω₁, secosω2 = ﹩\sqrt{{e}_{2}}﹩cosω₂, sesinω2 = ﹩\sqrt{{e}_{2}}﹩sinω₂.