Comparison of the best-fit of a spectrum fitted with model-1 (three top panels), and model-3 (three bottom panels), the last was the final result from the code. The Hβ and MgII regions are zoomed, and the total fit and residuals are also shown. The main difference between the two fits is the use of [OIII]winds. Dashed lines delimit the region where the DWT flagged the residuals structure (see Appendix A). All panels have the same arbitrary units on y-axis.