Trading rules may be left blank. However, blank rules never generate trades. However, several of the stops perform this functionality. For example, the Maximum Loss stop will close a position if it loses more than a specified amount. When a stop is triggered, the position is closed regardless of the current status of your trading rules.
Stops automatically take entry and exit commissions into account.
Stops are set by clicking the Stops button from the System Editor dialog. The following are the stops that are available in MetaStock. The stop is placed at the price where the trade could be closed and the proceeds generated would equal the current equity amount. This stop closes an open position when the security's price does not generate a minimum positive price change within a specified time period. Type the Minimum Change and the number of Periods.