====== ROC Function ======


  * ROC( <value>, <periods> )
Computes the rate of change of the specified value over the specified number of periods.

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<datatables>
^ Function Parameters^^
^ Parameter ^ Description ^
|<value>|The value to compute the rate of change of.|
|<periods>|The number of periods to look back while computing the rate of change.|
</datatables>


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