Discipline is maintained even in turbulent markets since trading rules are set, and transaction execution is automated. The field is often lost due to emotional reasons, such as fear of losing money or the desire to squeeze out a bit more profit from a transaction. Because the trading strategy will be executed precisely, automated trading helps to retain discipline. Furthermore, "pilot error" is reduced. For example, an order to purchase 100 shares will not be mistyped as an order to sell 1,000 shares.