Thanks a lott ankit. Now my confusion is completely clear. However, in my chart, i am not getting first 30 min candle as 955-10. I am downloading past data from investbulls.com. It has data like this :
NIFTY_F1,20090617,09:55:00,4497.00,4505.25,4497.00,4504.00,301700
NIFTY_F1,20090617,09:56:00,4504.50,4504.50,4494.85,4496.70,198150
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NIFTY_F1,20090617,15:28:00,4339.00,4343.00,4339.00,4343.00,349350
NIFTY_F1,20090617,15:29:00,4344.80,4347.00,4343.05,4343.25,351350
NIFTY_F1,20090617,15:30:00,4340.00,4340.00,4340.00,4340.00,60800
As i upload this data, in 30 min chart, i am getting first candle at 10:24 ! and in 5 min chart, i am getting first candle at 9:59.
Can u plz help me with the settings.