I think scalping on spot market is very hard to do because we only possible to gain profit from the increasing price. I see many trader doing scalping on leverage and futures trading, that allow to make profit from uptrend and downtrend. To make profit consistently from scalping is very hard, and less probability to success from it. Only trader with good psicology and good risk management can make it. Use of stop loss is should be in scalping to minimize loss.