How to Size Your Stop Loss in Forex?

Do you usually put a 30 pips Stop Loss or less? Well, the truth is - if that particular day is making some 50 pips move, then your SL will be easily tripped off. Nowadays, market is very volatile and the market itself is constantly easily moving 50~80 pips in any direction before any re-bounce. 

For further explanation, you may refer to this link: http://orderflowforex.com/2011/09/the-bigger-your-stop-loss/