Is it ok to hang a" lucky charm, Buddha bell" on the outside of a front door faceing south? It is not a bell made to hang on a door but, it looks nice there and will hold up to weather.

In my opinion, generally, a single bell is still acceptable (especially) if one considers it as a decoration.

BUT try to avoid any wind chime that are:-

1.1 Solid rod wind chime
1.2 Too colourful wind chime.

For the Chinese, bells have a significance. And unlike wind chimes, some are used by monks to "capture" spirits. And it is said that many spirits are "scared" of bells. This is ONE view point of a bell. Of course there are other interpretations.

Thank you for such a quick response. It was very helpful. I wish I could figure out how to post a picture of my bell, that would have been more help. lol