Hi Yong Take a good look at what the two formulas report and then try various options to see what changes and what is different between the two. When I looked at the weekly formula it was clear that "dynamic/current" mode allows the HIGHs and LOWS to form dynamically as each week progresses. This allows these values to move to new weekly highs or lows during the week rather than only at the end of it. There are other differences too. Neither formula has been designed to offer every possible option so it's really up to you to decide which one is the most appropriate for your use. Take a close look and you can probably answer your own questions. Roy