Meanwhile, the exchanges are see large volumes at low prices.

If this isn't market manipulation, I don't know what is.

Look at BCX's post history https://bitcointalk.org/index.php?action=profile;u=29445;sa=showPosts

He has never pulled off a TW attack. He has only made claims about them, but admits he "never got to wear the badge" https://bitcointalk.org/index.php?topic=546338.msg5961485#msg5961485

Everything he has done has been FUD with no proof. Never has he demonstrated any coin killing capabilities.

Other notable failures:
Failed to attack namecoin:  https://bitcointalk.org/index.php?topic=43465.0
Failed to attack litecoin:     https://bitcointalk.org/index.php?topic=94912.0

Someone has even gone so far as to create a petition to have him arrested https://www.change.org/p/bitcoinexpress-have-him-arrested