so if i buy a stock at 10 with limit order and then it goes up at 11 and i want to sell it wich order type should i use limit or market? for this you should use Level 2, so you can actually see if there´s someone willing to pay 11 for the stock. if there´s someone you can use limit, if you want to sell it inmediately you can sell it at market price and it will be sold to the higher bider (not always the price you want)

thank you for your input Roma

thanks roma i get it now, but how do i use these two order types when i am shorting stock?

no worries bro, sorry if my english is not perfect haha, for shorting stock its exactly the same, when you want to borrow a stock, you can put limit order to sell it at the highest price possible (but it will only activate if last price reaches that price) or you can sell it at market (which you can use level 2) when it´s time to bought it back it´s the same process, is it clearer now?