Such jobs are my daily practice. I plan to complete the project via writing an Excel macro contained in a separate XLSM file.
This approach makes further use of the macro very convenient by offering a Control sheet to identify the current input and output files, active controls (e.g. for inputting symol, date range), etc. This approach makes further use of the macro very convenient by offering the usual Open file dialog or a Control form containing information necessary to identify the current input and output files. Further use of macros, fixing of bugs and minor changes are included in the bid without any additional fees.
Regards!