Your smallest lost should be your first. If you decide to wait until the market turns to see if you will get out of it, you risk a good chance losing much more than you would like.
Trade with a trading plan arrived at from a simple trading system. Learn the platform, some indicators, a time to enter and exit, and what an appropriate amount of risk would be. When you have the edge in your favor you will not be worried about losing once in awhile, because you know you will have some big wins as well.
Most people have their biggest losses when they stay in a trade, hoping that it will come back. They either get a margin call or have a panic attack and get out just as the market is ready to turn back in their favor. Far too often people will enter on the peak of a trade and get out on the extreme low. My thinking is this: Why ride the trade down when you could hedge it or close the losing side and enter another trade the way the market is going?
Emotions creep in and you cannot see what is really going on in the market. As soon as you get out everything starts to clear up. You start to see what you could have and should have done. If you trade with a plan and a system then you are ahead of most traders. You have an edge. Trading is more than buying and selling. It is controlling fear, greed, and getting experience. This market can be learned but like any other skill, give it some time and practice.