I think at this point, we can assert with almost absolute certainty that HMJr is indeed SMM/Pedro Coderch.
~The trading website is a dead giveaway.
~The facebook profile pic of HMJr is also very suspicious, shows that he also has an interest in bodybuilding which was not really clear from the get go.
~They have both claimed the same FIDE ELO rating (2100), and SMM could've easily exaggerated there, as 2100 is certainly not super-genius level. We all know that SMM is always the best in everything he does, not in chess, though.
~Everybody knows that being a pedophile is not accepted by society. I'm sure the real SMM knows it, too. He doesn't want his parents to know that he's into underaged boys and girls. Thus posting under his real name would be very, very stupid and I can't imagine anyone dumb enough to do it that way, especially given the chance to turn himself into an anonymous and unverifiable person.
~Melao is a big liar. He founded a bullshit IQ society that has been challenged along with his academic claims etc. (deleted wikipedia page). SMM is a big liar, if not one of the biggest on earth. Both lack integrity. Big time. They're cut from the same cloth.
Those are, at least to me, very strong evidences that he's the HMJr guy and not just Pedro Coderch. It just doesn't make sense to talk such incriminating bullshit on the internet under your real name.