GAIN Capital Launches GTX Direct, an FX Prime Brokerage Service for Professional Traders

BEDMINSTER, New Jersey, May 23, 2011 -

GAIN Capital Holdings, Inc. (NYSE: GCAP), a global provider of online
trading services, announced today the launch of GTX Direct, the new prime
brokerage service offering for its electronic communications network (ECN)
for institutional and high net worth investors.

GTX Direct allows qualified investors without an existing FX prime
brokerage relationship to leverage GAIN Capital's central clearing facilities
in order to access the liquidity available in the GAIN GTX marketplace.
Previously, only clients with existing bank FX prime brokerage relationships
could access the best available pricing in the marketplace.

"GTX Direct is a unique service that addresses the needs of individuals
and institutions who are looking for a more diverse pool of liquidity," said
Vincent Sangiovanni, chief operating officer, GAIN GTX. "Now, clients can
leverage GAIN Capital's longstanding FX trading relationships to trade on all
prices in the GTX marketplace, whether from participating banks or other
clients, with the added advantage of a short account opening process. Our
ability to provide clients with security and transparency of their assets in
segregated accounts further enhances the GTX Direct offering," added Mr.
Sangiovanni.

GTX Direct is the latest development for GAIN Capital's institutional
business, which has experienced strong client and volume growth since its
launch in early 2010. In less than one year, GTX has attracted a deep pool of
liquidity providers, including a network of 10 prime brokers and a diverse
client base of buy-side traders.

Today, GAIN GTX offers liquidity in more than 50 currency pairs, with
precious metals to be added in the next several months. Earlier this year,
GAIN GTX expanded its London presence and opened a new office in Singapore to
better serve clients in the Asia Pacific region.

About GAIN GTX

GAIN GTX is a fully independent FX ECN featuring advanced execution and
order management capabilities, powered by a sophisticated credit engine. The
technology allows users to trade with all GTX participants, not just the
traditional liquidity providers, providing a true client-to-client trading
experience. GTX also features robust algorithmic trading capabilities,
enabling clients to develop and implement a wide range of buy- and sell-side
trading strategies using GTX's Java or FIX-based APIs. GAIN GTX is also a
powerful aggregation tool for the pooling of liquidity into a single user
interface. GTX aggregates streaming executable prices from multiple liquidity
sources and automatically displays the best price available, helping to
optimize liquidity and ensure best execution.

For further information regarding GAIN GTX, visit www.gaingtx.com.

About GAIN Capital

GAIN Capital Holdings, Inc. (NYSE: GCAP) is a global provider of online
trading services. GAIN's innovative trading technology provides market access
and highly automated trade execution services across multiple asset classes,
including foreign exchange (forex or FX), contracts for difference (CFDs) and
exchange-based products, to a diverse client base of retail and institutional
investors.

A pioneer in online forex trading, GAIN Capital operates FOREX.com(R),
one of the largest and best-known brands in the retail forex industry. GAIN's
other businesses include GAIN GTX, a fully independent FX ECN for hedge funds
and institutions, and GAIN Securities, Inc. (member FINRA/SIPC) a licensed
U.S. broker-dealer.

GAIN Capital and its affiliates have offices in New York City;
Bedminster, New Jersey; London; Sydney; Hong Kong; Tokyo; Singapore; and
Seoul.

For company information, visit www.gaincapital.com.

Gain Public Relations Contacts: In EMEA: Sorrel Beynon, +44(0)20-3047-2368 or Laura Crooks, +44(0)20-3047-2366, both of Edelman, gain at edelman.com; or In North America: Christa Conte, +1-212-808-4902 or Savannah Tikotsky, +1-212-808-4903, both of Feintuch Communications, gain at feintuchpr.com; Gain Investor Relations Contact: Henry Lyons, GAIN Capital, hlyons at gaincapital.com, +1-908-212-3980