e.g.

3 jan 2001
01 minute - 110 rows condensed
02 minute - 56 rows condensed
03 minute 56 rows condensed
04 minute - 59 rows condensed

04 minute values
OP:- 114.58 from very first row
HP:- 114.60 from 7th row
LP:- 114.53 from any of seven rows (incl. last row)
CP:- 114.53 from very last row