Let me recollect how this chart works.You can get daily figures in critical points..& also the Plan your trade post as to trend details.
MACD is positive - Nifty would be seen above the band
MACD is positive but D.macd.div.tick is negative - Nifty would tend to come down towards the Upper band & sometimes touch it also.
MACD is positive but D.macd.div.cross is negative-Nifty would get inside the band.Depending upon the positivity or negativity of D.macd.div.tick,nifty would either be at the top or bottom of the band within.
When MACD becomes negative,nifty would tend to go below the band.
Now,nifty is seen in MACD is positive but D.macd.div.tick is negative.Thus,nifty is coming down towards the band around 6400.Note that D.macd.div.cross is still positive.Thus,nifty is not expected to get inside the band now..Thats why we are assuming that strong support exists around 6400 for the time being..(Max open interest on the put side also has increased to 6400 today!!!)