This format appears only during EXPIRY week.
This is based purely on PRICE ACTION with no emphasis on OPEN INTEREST.
As pointed out by TIMEPASS a few days back,we use xx50 ,since
50 points ,mean a lot ,especially during EXPIRY.By that time
interest in those xx50 strikes ,will be little high ,though
they are not comparable with other strikes.
We take the EXPIRY zone as reported in the previous day as our
starting point.Then keep on representing the PENNY OPTIONS (Price less than Rs.10) in WHITE colour, in that zone.
The EXPIRY ZONE is
(6000~6200) for second day.
It appears the CALLS are still OVER-BOUGHT ,though they lost badly in today's market.
(Personal view)