Traders who use a scalping strategy place very short-term trades with small price movements. Scalpers aim to 'scalp' a small income from each trade in the hope that all the small benefits accumulate. As a scalper, you must have a disciplined exit strategy as a large loss can eliminate many other benefits that have accumulated slowly and steadily. Forex scalping is particularly common for trading currency pairs.
A scalper would operate away from the common mantra "let your successful trades run", as scalpers tend to take their income before the market has a chance to move. As scalpers generally operate on a risk/reward ratio of around 1/1, it's common for scalpers not to make a large income per trade, focusing on increasing their total number of smaller successful trades instead.