Add stock grouping option

It would be great to be able to group stocks, without pie. What i mean, i have europe stocks and us stocks. I would like to see how much eu portfolio group changed per day/week and so on.
Or to group individual stocks by category, like transportation and so on. I dont want to create pie as i buy individual stocks, but want to see my group growth, sector and so on. I know i can create pie and import stocks, but i might want to buy 1 stock, sell another and import/export is not conviniente.

Thanks for consideration