trading levels

oil 14-6-10
trading levels lows 71,6 highs 76,8
R3 75,6
R2 75,2
R1 74,55
N VALUE 74,28
S1 73,8
S2 73
S3 72,2

This is today's levels that I use

sell as close to the highest level that is possible
buy as close to the lowest level that is possible
and sometimes it gets a little trade between levels if it feels right for the moment