I'll volunteer to help...

[Scott Minster]

>     The command "gnucash --add-price-quotes $HOME/gnucash.xac" can be
>     used to fetch the current prices of your stocks. This can be
>     automated by creating a crontab entry. For example, to update your
>     file every Friday evening after the Wall Street markets close
>     (modify the time accordingly for your time zone), you could add the
>     following to your personal crontab:
>
> 	0 16 * * 5      gnucash --add-price-quotes
> $HOME/gnucash.xac > /dev/null 2>&1

Does this work if Gnucash is already open with that file?  I tend to leave
Gnucash up all the time since it takes so long to regenerate all the
different reports I have.

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Scott Minster