JorgeStolfi
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April 17, 2015, 11:43:46 AM

Arbitrage transfers a dump anywhere to all other exchanges very quickly -- in less than a minute, it seems.  The 1-minute charts rarely show a delay.  One would have to look at the logs of individual trades to tell who started it.
The 1M question is: "But, are they real?"  Grin

Well, if an arbitrager dumps 300 BTC at Bitstamp that he bought at OKCoin, you can be sure that those Chinese coins were real.

Unless most accounts at Bitstamp and OKCoin are NotLambChop sockpuppets, and he is having fun selling to and buying from himself, just to manipulate the price and have fun at the expense of the other traders.  Grin