Adding US, Canadian and London Stock exchnage symbols through IQFeed

Adding US, Canadian and London Stock exchnage symbols through IQFeed

IQFeed can provide data feeds for such exchanges and different exchanges may differ wrt prefixes with the symbol code.
For US stocks the standard symbols are used.
For Canadian the standard symbol is preceded by the letter C and a period (C.BCD)
For LSE the standard symbol is preceded by the letter L and a period (L.VOD)