There's not only one type of steam and any market move including the opening price can be viewed in the same way. Whats important is that you know the real number to start with, after that it depends when the move was made.
Personally I wonder why People put so much weight on other unknown moves when the Books are already paying the best around to lean the real figure and 9 times out of 10 your going to be on the right move which gives you a lot of options later. :drink: