Well, it's rules based but some of the rules act on information provided by other web sources. It would also require inputting new parameters for each trading day.
What about Sunday being included in the calculation? I would assume most ATR indicators include Sunday. It sure seems like it would needlessly skew data on the low side.
most charting packages would have settings where you would include/exclude after trading hours (ATH). I would personally include only NYSE hours for equities when computing ATR..too illiquid otherwise.
I'm dealing with Forex. Just a few hours on Sunday evening count toward an entire day's calculation. It's weird but the option to exclude is not available on the basic ATR indicator which is included in every copy of MT4. Of course I can find ones that will do it but I'd rather use what's most popular.
STD (apropos) and SML have found each other's PM inbox so we can all call it quits. Ghost of Rentech is here.