It doesn't matter. A 14 day look back period on a daily chart is just as arbitrary as the 15 min time frame is itself. Or any other intraday time frame for that matter. There are no magic numbers.Quote from VinMan:
If I am using the 14 Day ATR Daily, should I use a different ATR for my 15 minute chart to factor in more data? And if so, how do I go about that?
Quote from Lucrum:
It doesn't matter. A 14 day look back period on a daily chart is just as arbitrary as the 15 min time frame is itself. Or any other intraday time frame for that matter. There are no magic numbers.