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CLOB & RFQ Platform for a Competitive FXO Trading Market
28Stone built a new voice broker-supported electronic platform with innovative functionalities for FX options trading to directly compete with the industry-leaders. The newly developed platform quickly gained traction, emerging as a preferred trading application among many FXO market participants.
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Transforming FX Options Trading: A CLOB & RFQ Platform for a Competitive MarketFor years, our client’s voice broking arm (in partnership with one of the world’s top interdealer broking firms) held a dominant position in the foreign exchange options (FXO) market. Following a spasm of disruption caused by market participant divestment and the introduction of new platforms, an opportunity arose for our client to create a new broker-supported electronic platform to rival the upstart solutions.
Client
Interdealer broker
Industry
Electronic broking
Asset class
Foreign Exchange Options
Services
The Challenge
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Technological Complexity
The new platform had to be built on a completely new architecture while seamlessly integrating new and legacy FXO desks with minimal disruption to existing operations
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Need for Innovation
To stand out in a competitive market, the platform had to introduce new ways of FXO trading, evolving the asset class beyond traditional methods
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Time Constraints
The platform needed to be developed and launched quickly to capitalize on the market opportunity

With our client’s electronic broking arm separating from its voice businesses—and those voice businesses subsequently being sold—a unique opportunity emerged. The new company sought to launch a voice broker-supported electronic platform for FXO to directly compete with the industry-leading platform at the time. This undertaking required not just a new platform for the competitive market, but also a solution to seamlessly integrate both new and legacy FXO desks while being built on an entirely new corporate technology architecture.

Not only was the new platform expected to match the capabilities of its established competitors, but it also needed to introduce innovative trading functionalities that would set it apart in the FXO market. The scale and complexity of this transition were immense, and our team had to also ensure minimal disruption to existing operations when delivering the solution.

The Solution
To meet the challenges of building a competitive, next-generation FXO trading platform, 28Stone leveraged its deep expertise in electronic broking models, interdealer trading platforms, and distributed trading architecture. Given the complexity of integrating multiple FXO desks, as well as the need to introduce innovative trading methods, our team took a strategic, multi-faceted approach to development.
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Scalability & Flexibility
The platform was designed to be modular, ensuring it could evolve with market needs.
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Innovation in Trading Methods
New tools and trading modalities were introduced to modernize FXO trading.
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Seamless Integration
A robust architecture was developed to connect existing legacy systems with the new company’s infrastructure.
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User-Centric Approach
Built with direct input from traders, ensuring an intuitive and efficient trading experience.

The new system was built on a modern, corporate-grade architecture that ensured scalability, flexibility, and high-performance execution. One of the most significant technical challenges was the harmonization of trading flows across legacy systems from the client and the newly created trading desks. This required careful mapping of order management, pricing, and execution mechanisms to ensure a cohesive, centralized trading environment for all participants.

To differentiate the platform from existing competitors, 28Stone introduced new, voice broker forward trading functionalities. These enhancements provided Brokers with more control over price dissemination and traders with more efficient execution options, improving both liquidity access and order matching. A key focus was delivering a highly intuitive and trader-friendly user interface. Our team worked closely with stakeholders to design an optimized trading experience, ensuring real-time data visualization, seamless broker/ trader coordination, and flexible workflow customization.

The Result
The newly developed platform quickly gained traction, emerging as a preferred trading application among many FXO market participants. Its innovative trading functionalities not only provided a competitive alternative to established leaders but also helped shape the future of FXO trading by introducing enhanced methods and tools that improved market efficiency and helped evolve the asset class. Since the platform’s launch its market share in FX options has grown rapidly and significantly making the company one of the world’s leaders in the industry.
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Market Share
The platform gained significant market share and is consistently among the top 3 FXO trading platforms
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Unified Interface
Unified interface for accessing the CLOB and RFQ screens, enabling clients to efficiently source liquidity. 
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250 Currency Pairs
The platform supports over 250 currency pairs and offers various strategies.
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Customizable interfaces
Customizable interfaces built with HTML5 technology and Openfin allow each trader to design their own preferred setup.

Beyond market success, the platform’s flexibility and extensibility provided the client with a cost-effective strategy to phase out several legacy FXO trading systems, reducing operational expenses and streamlining their technology footprint across all FX asset classes. The project set a new benchmark for interdealer electronic trading, reinforcing the client’s reputation as an innovator in the FX space and electronic trading.

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Session Matching
Session Matching
Post Trade Tear Ups
Post Trade Tear Ups
Trade Workup
Trade Workup
Central Limit Order Books
Central Limit Order Books
Auctions
Auctions
Dark Pool & Trade Crossing
Dark Pool & Trade Crossing
Voice Broker Whiteboards
Voice Broker Whiteboards
Optimized Trade Matching
Optimized Trade Matching
Continuous Matching
Continuous Matching
Interdealer RFQ
Interdealer RFQ
Volume Matching
Volume Matching
Client to Dealer RFQ
Client to Dealer RFQ
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28Stone is a software consulting company for the financial services industry headquartered in New York, NY, USA
28Stone is a software consulting company for the financial services industry headquartered in New York, NY, USA
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