Patrick, Been looking at the ForumDLL manual. Looks GREAT. Thanks so much, you've done a fantastic job. I was reading the instructions for the VarREF function (one I requested in particular). You mention that if the result in the 'Periods' argument is not an integer, the integer portion of the result is what will be used in VarREF - i.e. VarREF effectively applies the 'FLOOR' or 'TRUNCATE' function to the argument before using it in VarREF. I think what it uses is TRUNCATE. They are two different functions. I think a more correct result could be gained by nesting the main PERIODS formula argument within the ROUND function. Using your example from the manual: ExtFml(“forum.VarREF", Stoch(5,3), Mov(C,10,E)) becomes ExtFml(“forum.VarREF", Stoch(5,3), Round(Mov(C,10,E))) Would VarREF accept this? Also regarding your note: I'm very aware of the changeable nature of zigzag and lastvalue based formulae :( and this inherent flaw when it comes to system testing, but I actually have a very specific requirement for forward or 'future' looking REFERENCE functionality. Actually, more correctly, I'm not really wanting to look into the future so much as to look at a point in the past from a point some time further back in the past. Does that make sense? Maybe this will help to illustrate it better: Say today is 2006-03-25 (Mar 25th). I have an indicator plotted, the value of which on 2005-11-25 is calculated using a value on 2006-01-25. Remember that it's now 2006-03-25. The indicator is 'looking into the future' from it's perspective datewise, but not actually into the future from my perspective as it's now 2006-03-25. I use that value as plotted on 2005-11-25, which refers to 2006-01-25 for calculation (which will be correct as it is also history from my perspective), to decide what my market outlook is. I employ a lot of statistical analysis and use Elliott Waves. It should probably be left up to the individual trader to decide (s)he should(n't) use this functionality. That said, I don't mind you not wanting to use it, but can you give some pointers as to how I might adapt what you've done to allow this? Thanks again for your commendable efforts. Regards, skeeta 8)