That's how market making works. GDAX has 0% for them, so is very attractive for liquidity providers.
I'm trying to be one of them, and I don't really care where the market is, as long as I can get rid of a certain position. That will make me offer prices on top of the book. If you grab a bunch of people like me, competing for that top of the book, what you ...
It simply is someone with a lot of coins, who sold on the open market and depressed the price (temporarily). It was an economically unwise decision, since they missed out on the fair market value as you saw.
This is one example of how the Powerful Elite can Thwart Cryptocurrencies.
I'm pretty sure you'll never get an accurate number. I'm not even clear what you mean by transferred into the bitcoin economy.
If I bought $100 worth of bitcoins 3 years ago, do we count that as $100 or the value of the BTC now?
If I buy a bitcoin for $100 cash (using localbitcoins), send it to my friend (who immediately converts it to $100 USD), how do we ...
You can't, but you could do something similar.
To start off with there isnt a single set of order books for BTC/USD, because there are dozens of exchanges each with their own set of books. Aggregating all of data from all the exchanges in to a single order book isnt going to work due to the pricing differentials (arbitrage opportunities) across the ...
Original MtGox Shared Dataset
Once upon a time there was a Google BigQuery dataset that was updated often with MtGox's official trade record. That's no longer being published because... ask someone who should explain it.
Data on Google BigQuery
The BigQuery shared MtGox Trades dataset is (@2014-04-20) available at