Script for accumulation over a specified range

I am trying to look at areas covered in a specified timeframe and would like to multiply the price range by the cumulative volume and have the tool do that.
I am trying to add a label to do the multiply to the Time Price Measure tool. I have seen this help page:
https://help.optuma.com/kb/faq.php?id=388
The closest I can come up with for generating the cumulative volume so I can use it as a variable is:
ACC(VOL(), RANGE=Look Back Period, BACKTYPE=Date, STARTDATE= D1)
That formula doesn’t fit in the box, and also will a ‘timeframe as default’ get the selected range over the line drawn for the tool? It doesn’t seem like the timeframe can be specified that way.
It seems like I need to specify the range as RANGE=abs(P2-P1), but that isn’t an option inside the ACC function, and the period would be (I2-I1) and that isn’t an option either.
Is there a hidden ‘FOR’ loop supported?
Also, when adding a label to this tool, there is no ‘…’ to bring up a script, so I don’t see how to add a script for the label. I can add some functions only in the provided box.
I went through the beginning, intermediate, and advance training videos, are there other videos that go into lower level script functions?

Thanks for your help.

Hi Robert,

The standard scripting functions can’t be used in the TPM labels and I can’t see a way of using the ‘Cumulative Vol’ value in a formula, so unfortunately I don’t think we’ll be able to do that.