I’m trying to write a very simple indicator
that references itself.
 
Like:
 
ab = C - 100;
 
ab =   IIf(C < Ref(ab,-1), C
+ 100,
             IIf(C
> Ref(ab,-1), C,
             C - 100));
 
Plot(C,"Close",colorBlue);
Plot(ab,"ab",colorRed);
 
 
In my first attempts I didn’t use the first
assignment of zz and got an error: 
Variable 'zz' used
without having been initialized.
 
Now, no errormessages appear, but only the close will
be plotted.
 
Can anyone help?
 
 
Arie