It is very difficult to do scalping as most traders think. Working for 2-5 pips look simple. However, in realty, for gaining 2-5 pips most traders would see a draw down of 20 pips. It is almost impossible to develop a strategy for scalping. Since the short term noises are made use for making money, there will be no clear picture. Only experienced trades make money in a big manner from scalping. Scalping for 10-15 pips is fine for me. However, trying for 2-3 pips as you have mentioned looks very risky to me because we will forget the trend as a whole when we try to do it and get trapped.