Change in Value [Change]

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The Change in Value function calculates the amount by which a field has changed over a given period of time. Parameters ------------------ Data            The data to use in the calculation. This is typically a field in a data series or a calculated value. Period          The number of bars of data to include in the calculation, not including the current day.                     For example, a period of 3 compares the current day with the value three bars ago. Function Value ------------------------ This function returns the amount by which the data has changed over the given period. The Change in Value at the beginning of a data series is not defined until there are enough values to fill the given period. Close     Change(Close,2) ----------------------------------------    2    3    4                   2    6                   3    6                   2    6                   0 Usage ----------- Change in Value is often referred to as Rate-of-Change (ROC). See the description of that function for suggestions on the use of this function as an indicator.