It depends how you use them. If you do spreadbetting via FXCM, that's tax-free in the UK, but if you trade spot forex with them (I appreciate that Dax isn't spot forex!), that certainly isn't.
I think the OP is in Canada ...
Ahhhh, Capitals Gains is £10,000 or similar anyway, so tax free below that, likely nothing I have to worry about this year
I'm sure I'd forget to mention it to my tax man anyway
