Hα and Hδ for the estimation of Ṁ in IGR J17544-2619. We show the observation (solid blue line), best-fit model (Ṁ = 10^-5.8M_⊙/yr, D = 4, red dashed line), a model with higher Ṁ (Ṁ = 10^-5.5M_⊙/yr, D = 1, green dashed line), and a model with lower Ṁ (Ṁ = 10^-5.9M_⊙/yr, D = 8, pink dashed line). Different Ṁ values do not yield different Hα wings as long as the product remains constant. However, we observed that other important lines like Hδ are sensitive these variations.