Its true you need to know about the risk you are about to take,I will never advice that you take too much risk,always apply for proper risk ratio.
Its not really good for anybody to take risk in forex when its come to forex,one funny thing which you need to know is that there is an initial risk once you make a deposit,so taking additional risk is very bad rather we need to learn how to control our risk to the bearest minimum.
Even the professional trader do loss due to lack of proper risk ratio application,so we need to be careful with risk