Hello antlizzie.
Excalibur trades on the Canadian National Stock Exchange (CNSX).
http://www.cnsx.ca/
We covered that question before and how to trade on the CNSX.
Just go back some postings and you'll find all relevant information.
Look at the "Hub Home" and "Link Library" sections on this hub for all relevant information on XBR.
Cheers,
FANTOMAS