Initial Balance in my view begins with cash hour of the index. That means for the Dax a start at 9am.
For my own trading - doing it on 30min candles - the Initial Balance (IB) is from 9:00 to 9:30am.
During this time the price battle is going on with normally good volume. I define even a low and a
high volume forcing me to stay at the sidelines for the day as the whole setup does not fit with my
trading plan.
All those rules are part of a longtime survey of the Dax behavior. The system might give a lot of good
results for a given period. But picking only the best times and avoiding the bad days when the setup
is not good then your overall results will be much better.