I guess you're probably right, but 6k isn't that much. The bid sum has just touched the ask sum, might be crossing any time now. We should be at least at 117-118.
The volume is almost half of what it was during the weekend though.
"The bid sum just touched the ask sum" This doesn't really mean anything. Well, at the current scale of the chart, it does mean that ask sum is shrinking or bid sum is rising, or both. The Y-axis of bid sum and ask sum are scaled to their respective highs and lows, with no correlation to each other.
I do agree that we should be rising a bit based on a number of factors.
Volume is peaks at times when volatility is at it's highest. What day of the week it falls on is arbitrary.
The line to watch is the red line. This tells you if the bids are rising relative to the asks, and vice versa. Looking at that image it seems pretty stable with perhaps a very slight uptrend to bids recently