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We need a Visual Basic macro written for Excel, to download stock data for ONE symbol only into specific cells of our spreadsheet. The macro needs to update whatever days are missing, from a specified start date onwards. There will be no user-modifiable options so all that is needed is a 'DOWNLOAD' button on the Excel sheet.
The Macro should be compatible with all versions of Excel. As it will be used every day, it needs to be clever enough to compare today's date with the last downloaded data in the spread sheet, so that clicking 'DOWNLOAD' always keeps the data upto date.