Karnani Sir, Welcome back. Was missing your presence here and all your posts but now you gave me one more reason to chk TJ frequently.
Regarding your doubt on which Open/Close level to use ?
What I have described here is a setup, not a precise trading strategy with buy pt/sell pt. To get NR7, we are bothered about high/low of the day which
is not impacted by open/close on majority of the days. (I did a quick chk and found that in last 300 days, only for 22% of the time, we had the situation when H/L of the day was
same as either open or close).
While interpreting the contraction, we need to be a bit subjective and look at bigger picture. For example, if last 10 day's average of daily range is 100 pts, and if todays range is 70 pts, then it indicates contraction. If the number comes to 73 or 75, it is still contraction. So as a first check, one can use H - L to get the range for the day and find out if it is NR7 or not.
But smarter way will be to also look at today's range and compare this with 10day (or any other periods) average range and see if it is < 80% then flag today as contraction day.
To take a trade on this, I will certainly support your idea of putting small filter on NR days H/L and then take trade entry.
Satya has been working on using NR7 setup trigger to swing trade on 60m chart. Maybe he could also share his thoughts on precise entry/exit levels.
Hope this helps.
Happy Trading