Lose by slippage

Since the possibility to set the minimum range for executing trade, we must realize that in real live trading we will fight with slippage. Forcing expert adivisor to close profitable trade with just one pip may look amazing in back test result. Unfortunately we can't perform slippage simulation during backtest. Generally each backtest result should be recalculated by reducing all profitable trade with slippage, as well adding losing trades by slippage.
Now let we make backtest using fixed lot. At the end of backtest we could see average profit in pips by converting average profit in money with pips value. How many pips our average profit in pips?
Scalping definition by brokers
Mostly in the Term of Service and Term of Condition every brokers tell about scalping method. Generally its about time and profit. No closing trade before x minutes or no closing trade less then x pips. Violate this rule can cancel all our winning trade and of course not for losing trade. We can still follow this rule however. In the other hand some broker will warn us if we executed xx trades in short period. For this kind of rule, we should consider finding another broker.