Coming back to the built-in ROC indicator, it uses the following formula:
(Input[0] - Input[barsAgo]) / Input[barsAgo]) * 100
This returns the ROC in percentage, not in points. It is not that difficult to create a new indicator that calculates the ROC in points using the following formula:
Input[0] - Input[barsAgo]
However, there is an easier way. You can “force” the built-in indicator to return the ROC in points by replacing
ROC(myInput, myPeriod)[0]
with
ROC(myInput, myPeriod)[0] * myInput[myPeriod] / 100.