When you start with a small amount of lots and a stop loss you will be cutting your losses short. Then when the trade goes in your direction you will be able to add on to the trade and let it run. Thus cutting losses and letting profits run.
When you are new to the currency market, this is a hard thing to do. The best thing to do is get a set of indicators that you like to work with and learn to trust them.
One good exercise is to take the price bars or candle sticks off and just trade when you see a signal from your indicators. This will not give you the maximum amount of profit from a trade, for the bars and candles do help, but you will start to learn to trust your indicators.