I currently dabble in the forex market and using a US broker. How will I be taxed on my earnings, and what happeneds if I lose money that year, is it a capital loss? HOw does this work in regards to canadian tax laws with the broker being in the US?

I am interested in trading forex but don’t know if capital gain tax is due in Canada on such trades? And what if I use a US based broker? I saw that some brokers are based in Swiss and other places and accounts open with them are capital tax exempt. Does anyone know more about it? Thanks.