Thanks for the suggestion. Here is what I mean:
The price has stayed at $350 all day, despite Mt.Gox and BTCChina going all over the place, even though the bid/ask depth looks very thin. That makes me think there are invisible walls in the form of bots who just buy or sell small amounts whenever the price moves beyond a threshold.
Obviously this has been possible (and going on) for years already, but I just wonder if it is becoming more prevalent.
No, there arent and have not been invisible walls on Gox, and most likely not on Stamp either.
Just because the price isnt moving doesnt mean there is an invisible wall. It takes volume to move the price. If there is no volume, there is no volatility.
If you somehow saw a 1k volume spike and the price barely moved, then there is something going on (Or, a visible wall).
But thats not happening. Some of the 200-500 volume spikes on Stamp have moved the price a lot; no invisible walls.