Shock n Awe chart gives you fair idea about how index behaves when it opens up after 18 hours of market close and during the day when market is open and active trading is going on. Market get a shock when it opens after 18 hours because lot of news, accumulated during those 18 hours, needs to be factored in. During the day it try to observe the shock and settle to a value and we call this process an awe. This is just another view of looking at index data.