POW CHART, page-3

Could you explain this NR7 in regards to POW chart. From my reading of the link you added, the chart they give as an example:




"The default look back period of this strategy is 7 days which means that if the price range of any particular days is lowest as compared to last 7 days, then that day is termed as NR7 day"

I thought it meant it had to have a 7 day period of a certain direction IE up or down? Hope you can expand on how this works thanks.