Session analysis is a connected story, not three separate charts
A lot of traders look at each session in isolation. That usually leads to random reactions instead of a real read. The cleaner approach is to ask what the previous session already built, then judge whether the next session is accepting that work, rejecting it, or forcing a new price discovery process.
That is why a strong London move means something different when it is expanding from a defended Asia low than when it is simply chasing an already stretched move into poor location.