yes stop loss is a part of the forex trading business. most of the trader use this opportunity of stop loss in the beginning when they just join the forex trading and a new trader in forex. this helps them a lot to reduce the risk of the loss. as in real account traders have pressure of loosing their money if they face loss. so stop loss enables them to secure their investment to the specific level , that they are nor blown out their account if they face loss while trading in forex. this is such a good opportunity for the traders in forex.