Comparison of the SFHs of the 5D Helmi streams (green) with that of the halo star selection (black) for different configurations of dirSFH. From left to right, we show the effect of: (i) the weighting scheme, (ii) different versions of BaSTI models (Pietrinferni et al. 2004); and (iii) and (iv) different recipes for modelling unresolved binaries in the synthetic CMD. In all cases we use the weighted option except in the first panel, where we assess the effect of a uniform weighting (dashed lines). In the three right-most panels we indicate the preferred solution discussed throughout the paper as dashed lines for comparison. All SFHs are normalised to their peak value.