Maybe these guys operate like Betfair scalpers, offering money to both sides of the book. Here's a quote from a former floor trader that I posted in another thread:
"If you assume that the true theoretical price is somewhere between the bid and the offer, then if you buy on the bid, you're buying the market for a little less than it's worth. Similarly, if you sell on the offer, you're selling it for a little more than it's worth. Consequently, on balance, my trades had a positive expected return, regardless of my strategy. That fact alone could very well have represented 100 percent of my success."
Jeff
georgesim wrote:I never understood these 4 or 5 second deal which help people earning huge amount of money in this short period of time. Can anyone help me to understand this pattern or 4-5 second deal, I tried to search it online but nothing useful came up. Thanks in advance,. It’s been a year in starting forex market.
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http://stockmarkettradingfordummies.com/