first when I start trading I always use one purchase and one sell order placed in my terminal at the same time but by the time it ends because my inefficiency is always gone. but now i can read the news chart etc so now i am working on a strategy that helps me a lot to improve. and I take input from fundamental news as well as do some technical analysis from the market as well. This way is better because we will have both types of inputs from the market so we can get better entry and exit points to choose. But a trader can use whatever he feels is making a profit for him.