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 = 70° and the constraints of NAFF stability threshold shrink the range of both (K₁, e₁) and (K₂, e₂). Note: secosw1 = ﹩\sqrt{{e}_{1}}﹩cosω₁, sesinw1 = ﹩\sqrt{{e}_{1}}﹩sinω₁, secosw2 = ﹩\sqrt{{e}_{2}}﹩cosω₂, sesinw2 = ﹩\sqrt{{e}_{2}}﹩sinω₂.