Ok, but when I paste the scrip from NOW to Excel, it takes OHL of the day so far. I am getting same sized candle sticks on Ami now The only dynamic variables are last traded price and quantity. http://imageshack.us/photo/my-images/443/amibroker.png/
data for back fill is in one minute interval, so you have , low, high, close, and volume, this volume is the total volume for the one minute interval. the format file Nest.
the format file reflects this.
For real time data which is ticker based, it is close (price), and volume (last traded qty). for this you have different format NSENOW2.
You should not have any problem if you follow the format file , the data in excel and the data in market watch should tally