Added space for clickability.

well ya, after manipulating the price down, what else is their to do but manipulate it back up!

that will happen naturally 

Will be fun when someone puts that 10k BTC order so that their fake walls get filled.

I did, and although there is a large dump and price movement I wouldn't personally consider it enough to be counted as manipulation. It's just a large dump.

From the Viedo:- "big sell-down + supporting fake asks-walls to prevent price going up again"

Price at dump: $127
Price at end of video: $121
Lowest price in video: $117

Doesn't even lose 10% of price over 11 hours and comes back to within $6 by the end. I'd hardly say that was a successful manipulation to prevent the price rising again, although on the longer time chart the price is driven down, that however can no way be directly attributed to the dumper as proven because price is rising back up after his dump. Also, I have an issue with fake asks-walls. I believe he's referring to the 0 volume asks. How can these be counted in the order book if the volume you require is 0, you can't ask to buy/sell nothing at (x) price? 

http://bitcoinity.org/markets/mtgox/USD

June the 2nd is where his video is from.

Look at June the 9th, wipes 20%(roughly) of the value then rises back to the pre dump level within 24hrs. Is this considered manipulation?

I'm sorry chaps but IMHO this is normal market play, only difference is in the Bitcoin market, there is a lot less volume and a lot less players and thus an increase in volatility and ability to move the market. Your telling me that if a large hedge fund/bank dumped a HUGE volume of a financial instrument, relative to market size, that this wouldn't happen on that market? It's how the markets work and its how the big boys make there money. Well, that and insider trading 

Would be fun when two manipulators are acting in opposite directions.

There might be algos that cancel the wall once some % of it gets fulfilled.

Funny, I thought of that after I posted. Bitcoin.de is interesting in that they don't have a bank. So, if someone is selling or buying, your transaction is going direct through them. You see the order book as a bunch of buy and sells that you can actually buy and sell on, jumping over orders if your wish. It is interesting in that a bid wall can be sold DIRECTLY into if you want.

Not to say that every wall is manipulative, but the Bitcoin.de model is actually where we might see decentralized exchanges going, it would just involve a person acting as an escrow (which Bitcoin.de does in a sense.) It is a relatively good method, but due to delays you can't jump in and out easily. You also can buy and if the price drops just not send the money (though you have 12 hours to mark it as sent - which I think is waaaay too much.) The penalty is that (now anyway) they can ban you. Before, and I got burned by this, I just gave the guy a bad rating. (And at that time it was a 24 hour window to mark as paid).

Regarding the video, I think the movement of the bid walls up, without every buying!, is clearly just trying to move the price, especially when it is followed by a dump at the top.

IAS

It's ok, I even typed things a bit slower than normal.