no you can not only buy in forex market some time you have to sell currency it depend upon the market condition that how market is going on if you continuely doing buy currency then it might be causes you huge loss from your trading when you doing trade in real account so always first understand and judge the market before doing trade in forex Bina market ko samajhe huye humen kisi bhi currency pairs ko yun hi buy aur sell nahi karna chahiye, market ki analysis karne se baad hi humen trading karne ke liye good entry milati hai jo ki achchi profit earn karne ke liye important hota hai, esiliye pahle humen market ki analysis karni chahiye.