Stock Chart module doesn´t work

It's probably because the default location for the 6.x version is in admin/settings. In admin/build/menu, try moving the stock_chart menu item out of the Administer sub-menu to some menu or sub-menu that is accessible to your users.

Okay, what doesn't work? You don't see the page? You don't see the chart? The chart doesn't get updated? If you want help, you're going to have to supply some relevant information. The more you provide, the more likely someone can help you. With what you've given so far, I've given you the only response I can think of.

You can't have the permission set correctly. You need to give the "use stock chart" permission to which ever roles you want to allow access to the charts.

I have it set up, here: http://www.oadaeh.com/, and gave anonymous users permission to use it as well. When I disable that permission, the menu item goes away.

Also, on my example site, when an anonymous user makes changes and clicks the "Save chart options" button, those settings are set globally and everyone gets the new settings. That is the way the module works. I never got around to implementing per user settings.