yes surely fear can be used to avoid losses in this trade because when someone is in fear he becomes aware and he takes steps carefully and avoids mistakes that result in losses. so fear is a very useful weapon to avoid failures and losses in this forex trading business and you cannot take advantage of your fears, forex is a high risk business and allows huge losses, but you can still benefit from your knowledge and experience so Don't be afraid and think positively that you will make money from this business.