dear sasi,
at 10.15 apply the factors 0.433, 0766 etc., to yesterdays range (H-L)
you will get a value for eq. today they are 21.10,37.35 and 66.55(as per my chart)
todays range at 10.15 is 22.65 (2843.8-2821.15) which is greater than F1 value but less than F2 value. so, we take F2 valueof 37.35 for all trades today.
==> buy order at 10.15 is L@1015 which is 2821.15+37.35= 2858.00
sell order at 10.15 is H@1015 which is 2843.80-37.35= 2806.55
modify the order at 10.35 as
Buy @ 10.35 low which is 2821.15+37.35=2858.00
sell @ 10.35 high which is 2853.20-37.35=2815.85
hope this clarifies.
to reiterate, after 10.15 am take the factor values only to modify your order.
P.S.: The above rates are as per my charts. May differ with your rates.