Here the best 10 social sources for traders, quant, and high frequency system developersHere are some highlights: StocktwitsA spin off from Twitter, this financial micro-blogging site lets newbies learn from the pro’s.  Join in the conversations or just watch and learn.  Tweets you see in your Twitter stream with the $ tag generally has been posted from the StockTwits network

TwitterToo many people still think Twitter is about updating friends on what you ate for dinner. In fact, it serves as a valuable resource for traders. Twitter can track useful market information, educational seminars, events, trading opportunities, and all manner of industry news
Profit.ly“Share your trades with the world” Profit.ly is a unique website that is changing the online trader’s community. Trades posted are all completely transparent as all trades have to be verified via your broker
Stock.ly helps users find the most relevant, timely, and focused financial content in real time. The new content/user ranking system means the most popular submitted blogs are pushed to the top of the newsfeed.  A great site to research stock information and industry news.Trade2Win ForumAn active trading community and a great resource for beginners.  Trade2Win has plenty of helpful experienced traders to answer your trading questions. Participate actively or just browse, there is something for everyone here.Linked InThe ‘Facebook’ for professionals, the LinkedIn Groups feature is an invaluable tool to mix and mingle with your peers.  Ask questions, answer questions, get connected to others in your industry.  From technical analysis to fundamental investment method’s, there is a trading and investing related group for nearly every topic and interest you can think of.
TradeStation Forums If you are using the TradeStation platform and EasyLanguage coding language, this forum is a must.  There is a discussion for everyone, from EasyLanguage tips & tricks to trading psychology and money management techniques.:LinkedFAA very new site for Financial & Insurance Professional and Investors.  LinkedFA takes social networking and industry regulations very seriously and is fully compliant with FINRA regulations.  It is still in its Beta phase and we will be watching out for this site in the future.
Trading HiveAnother new online trading network, this time aimed at the New Zealand community of traders.  In Trading Hive you can discuss trade setups, share trading videos, enter a live chat room, comment on a forum, start a blog.  Lot’s to do.  Still very new so not much activity going on but we are impressed with what we see so far.
InvestimionialsWe can’t recommend this site enough, with all the financial related products out there, how do you know which products are worth using and which ones to avoid?  Investimonials mission: “To help people discover the best financial products, increasing both their knowledge and wealth”.  Members submit reviews and discuss products on the forums and get rewarded for their honesty.  Discover products you never knew about and share your experiences with products you have used in the past.  DVD’s, software, books, banks, brokers, newsletters and more.  Before your next purchase, do your research at Investimonials first.  Review Advantage Trading Systems at http://www.investimonials.com/software/reviews-advantage-trading-systems.aspx.Thankfully sourced from: http://advantagetradingsystems.com/trading/top-10-recommended-social-networking-sites-for-traders-and-investors/?goback=.gde_1813979_member_35458435