It could be some kind of automated trader. I see that sometimes on cryptopia. A big wall that almost instantly responds to new positions above it. I assumed that would be some kind of bot. Or someone with a lot of patience and time to spend looking at the order books
I think so. But I really do not think it's normal bot. It's as if 2 people agree to create a sell order and another agree to buy it.
Say you create sell order for 15k
Someone would create a sell order at 14.9 and buy it quickly.