Description: A computer code (procedure) written in Interactive Data Language (IDL, version 8.4) to compute the spectral line profile indicators used by Lanza et al. (2018, A&A in press, arXiv:1804.07039). The procedure takes the fits files provided by the data reduction software (DRS) of HARPS or HARPS-N as an input. An example for the input files is provided in the directory /input with the sole purpose of allowing you to test the proper compilation and running of the procedure. Details on an auxiliary source file (mpfit.pro) required for compilation are provided in the header of the procedure file and in Appendix A of the above mentioned paper. Interested users are warmly recommended to read them before compiling and running the procedure. File summary and contents: - Readme: this description ASCII file; - asym_ind.pro: the IDL procedure to compute the asymmetry indicators and the FWHM of the CCF as specified by Lanza et al. 2018; please change the string PATH and the string OPERATION before compiling and running as explained in the header of the procedure file (see also Appendix A of Lanza et al. 2018); WARNING: when using files produced by the DRS of HARPS@ESO, please check the dimensions of the matrixes extracted from the FITS files because the current version of the procedure assumes those of the files produced by the DRS of HARPS-N@TNG; - mpfit.pro: the fitting routine used by asym_ind.pro (see the header of the above file for instructions about the compilation and Lanza et al. 2018, Appendix A); this procedure is authored by Craig B. Markwardt, NASA/GSFC; see http://cow.physics.wisc.edu/~craigm/idl/fitting.html - /input: a directory containing a sample dataset consisting of *_ccf_* and *_bis_* files of the star HD108874 as provided by the DRS of HARPS-N (see Lanza et al. 2018, Appendix A); for more information on this dataset you can refer to the GAPS series paper dedicated to HD 108874, that is Benatti et al. 2017, A&A 599, A90; - output.dat: the sample output file containing the asymmetry parameters and the FWHM of the CCF together with other information as specified in the header of asym_ind.pro. For further info please send an email to: nuccio.lanza@oact.inaf.it