I think market management means risk management. One of the easiest risk management tools to implement is the stop loss order. A stop loss order is placed at the same time as the primary trade. It is a way of specifying the maximum loss that the trader is willing to accept on a single trade.
Therefore, in the event of an unexpected price movement, the trader can specify how much he or she is willing to lose before the trade automatically closes. This simple, but very effective, order protects against large losses. Unexpected price movements can happen very quickly in the Forex market. The stop loss order protects the trader from these surprises and it allows the trader to leave the computer screen. In the round-the-clock Forex market, stop loss orders allow a trader to sleep well and avoid large losses.