Previous Signal of System [PrevSignal]

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The Previous Signal of System function returns the value of the entry/exit system containing this function for the previous bar. Parameters ------------------ Period          The number of bars of data to include in the calculation, not including the current day.                     For example, a period of 1 returns the value from the previous bar.                     This value will almost always be 1. Function Value ------------------------ This function returns the value of the entry/exit system containing this function for the previous bar. If the previous value is not defined, this function returns 0. This function enables functions and entry/exit system rules to be written which are based on the position that the entry/exit system is currently in. Since it evaluates the previous value of an entry/exit system, it can only be used in entry/exit system rules and functions which will be used in entry/exit system rules. Periods greater than one are typically not used. Since the Previous Value function can only be used within other functions, it is only available from within the formula editor for functions and entry/exit systems.