referencing multiple data series in powereditor

["Andrew Shin" <drewshin99@xxxxxxxxxxx>]

Hi all,

I have two data series in one chart, S&P cash and S&P 500 futures.  How do I
reference one or the other?  I would like to do something like:

if high of the futures is less then the high one bar ago, and the high of
the cash is less than the high of the cash one bar ago, then ...

i know that the first data series is easy, but how do i reference the second
data series?

thanks,
andrew