Every open trades are in risk if those are not opened in well market analysis. But it is not possible to say what percentage (%). Only for that if we want to open a risk free order, we need to analysis the market behave/movement very well and of-course for what time-scale we are using for the opening trades we must careful about it. To get a minimum profit from your orders you must set take/profit and if the trends of the market goes in negative and do not loss big money, set stop/loss too.