real quick example. say a company misses earnings and the price plummets $20. through observation, you can watch level 2 trades go through and see the stock is selling off, yet the price is not goin down past the initial $20 loss, even though there is a huge imbalance of sellers and buyers.
Did you actually read what I wrote? When the stock is "selling off",
somebody is buying it. If you want to sell, you need a buyer. If you can't find a buyer, you need to lower your price until someone is willing to pay it, or else you can't sell at all. There can never be an imbalance of buyers and sellers.
what I am saying is mt gox absolutely has to be a market maker and is stepping in to be the buyer of last resort. Mt gox doesnt want the price to go down because they make more commisions at higher btc prices, so it would be in their best interest to keep the price artificially high.
No, they don't. They make their commission on volume. If the price of bitcoins is twice as high, people can only buy half as many (they've only got so much cash to spend, after all). They're still trading the same amount of money, so Mt. Gox makes the same commission, and all the money they spent buying up bitcoins to keep the price artificially high is completely wasted.