Don't worry about DEV. I think he is miner as well as trader. These are the two basic levels you must accomplish in order you can become a crypto-coin developer, right? :-) So I bet he bought low and sold high.
Ya I'm still waiting for my buy to hit but the coin keeps going up dammit lol
Good luck getting it filled i put 10BTC buy wall at 190 if ypur tired and want out you can sell it to me