Gain Capital Holdings, which provides an online foreign exchange trading platform for retail customers, announced terms for its IPO on Thursday. The Bedminster, NJ-based company plans to raise $154 million by offering 11 million shares at a price range of $13-$15. At the mid-point of the proposed range, Gain Capital will command a market value of $536 million. Gain Capital Holdings, which was founded in 1999 and booked $188 million in net revenue for the 12 months ended September 30, plans to list on the NYSE under the symbol GCAP. Morgan Stanley and Deutsche Bank Securities are the lead underwriters on the deal, which is expected to price during the week of December 13.