Have a look at the below image
Here the difference between buyers and sellers is huge. But in the offer there are very few. Not even near. Now yes it may be that most of those big qty. order is placed way below and hence, not in the current offer section.
But what I want to say is whenever I see such a scenario, majority the buyers or (sellers in this case) vanishes in a blink of an eye which little to no price movement.
I have seen this 3 times now in past one week in different stocks.
Can someone tell me what are these. Are they algo bots or just a technical glitch or what is it?