Fx impact when trading

Salem ,
Most of the investment i am trading online on stock market are in euro or dollars and every time i close a trade i have an extra profit or loss because of currency fluctuations
1 is that profit came from fx impact halal also loss
2 do i have to change my currency base on the platform to the same investment currency
3 trading halal metals etc look like trading forex but halal way but is this kind of fx trading halal?
Thank you very much