One thing that could work is a separate downloader that downloads from Yahoo the whole list of symbols in one big text file. I could then write a program to manipulate this file into NT formatted files and import the whole thing at once into NT. In that case the daily work would be limited (it would take some time every day but at least it is then mostly automated).
Does somebody has a suggestion for a dowloader that can do mass import of historical data from Yahoo (multiple symbols at once and critically: includes the "Adjusted Close" field) into a textfile? I don't know how to interface with yahoo but manipulating a textfile such that NL can import it is not very difficult.
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