Given the popularity of individuals speculating on the foreign exchange (currency) markets, this seems inevitable… Social media firm Tradual has raised $2.6 million of a $4 million round led by North Bridge Venture Partners, according to peHUB, citing a regulatory filing. The Boston-based company doesn’t have a working website yet, so it’s not totally clear what they’re building, but it’s something having to do with Forex and social media. Money meets social networking has been a big trend, with sites like MyTrades, Stockpickr and several others attacking this area.