coding help needed

[Fred Bender <fbender@xxxxxxxxxxx>]

I am new to this list, so here is my first query:

Does anyone out there know how I would code a function, which I would
use in systems, for closing long positions, that reads:

the highest high SINCE ENTERING LONG, minus 3 times the Average True
range?

Everything I've tried merely reads the previous high or peak, which
frequently occurred BEFORE the trade was entered (since I'm trying to
buy dips in uptrends).

The basic concept is:  can we code for market position (In this case,
that it's long) in our system rules?

Any help would be greately apprecieated.

Thanks,

Fred Bender