Percent Change in Value [%Change]

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The Percent Change in Value function calculates the amount by which a field has changed over a given period of time, expressed as a percentage. 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, divided by the original value. The Percent 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                   100%          <--- (4 - 2) / 2    6                   100%          <--- (6 - 3) / 3    6                     50%          <--- (6 - 4) / 4    6                       0%          <--- (6 - 6) / 6 Usage ----------- Percent 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.