GoogleFinance.ca uses the same nomenclature as the main site ... http://finance.google.ca/finance?q=TSE:BMO http://finance.google.ca/finance?q=NYSE:BMO
If you enter BMO as the search term and click on 'get quotes' you do get the direct URL but the default page for this address is TSE:BMO http://finance.google.ca/finance?q=bmo I don't see any evidence that there is downloadable data for any Canadian stocks at either site, except for Canadian companies listed on the major US exchanges. IMO the reason TSE:RY returns an error message, when using AQ, is that the downloadable data does not exist e.g. AmiQuote will download data for NYSE:RY but returns an error message for TSE:RY
