Stock Trading App Development

From order books to live execution — production-ready trading platforms built for speed, compliance, and scale.

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Retail Brokerage Apps

Consumer-facing platforms for equities, ETFs, and funds. Includes fractional shares, IRA and brokerage account types, paper trading modes, and broker API integration via custodial infrastructure.

Prop Firm Platforms

Challenge dashboards, real-time drawdown enforcement, funded account lifecycle management, profit split calculations, trader leaderboards, and MT5 back-office integration.

Algorithmic Trading Bots

MT5 Expert Advisors in MQL5, Pine Script strategy bridges via TradingView webhooks, C++ execution modules for latency-sensitive environments, and backtesting engines.

Options and Derivatives

Options chains with live Greeks, multi-leg order construction for spreads and condors, margin calculators for complex positions, and multi-asset instrument support.

Social and Copy Trading

Signal provider leaderboards, proportional position mirroring at scale, subscription and profit-share mechanics, and follower management dashboards with performance analytics.

Institutional and White-Label

MAM and PAMM multi-account systems, FIX protocol connectivity, prime broker integrations, white-label infrastructure for new brokerages launching branded platforms.

Admin and Analytics Panel

User management with KYC status tracking, immutable trade audit logs with export for regulatory reporting, risk exposure monitoring across all open positions, revenue reporting by stream (commission, subscription, spread), and for prop firm platforms: challenge lifecycle management, drawdown breach processing, and profit split calculation. The admin panel requirements should inform the data model from day one, not be designed last.

KYC, AML and Identity Verification

Government-issued document checks, liveness detection, PEP and sanctions screening, source of funds verification, and ongoing transaction monitoring for SAR filing. Integrated with Onfido, Jumio, or Sumsub based on target markets and cost-per-verification budget. GDPR-compliant data retention with subject access request tooling.

Regional Regulatory Frameworks

SEC and FINRA govern broker-dealers and investment advisers in the United States. FINRA registration is required for platforms facilitating securities transactions. The SEC oversees market structure, disclosure obligations, and investor protection rules including Regulation Best Interest. For platforms trading commodities or forex, the CFTC and NFA impose separate registration and reporting obligations. Lycore designs the platform to meet the obligations of your chosen licensing structure from the discovery phase onward.

Audit Trails and Transaction Reporting

FINRA Rule 7450 and SEC Rule 17a-4 require broker-dealers to retain order and transaction records for defined periods. Audit logs must be immutable — implemented via append-only tables or write-once object storage with cryptographic checksums. Data retention: three years for most transaction records under SEC Rule 17a-4, with order audit trail records retained per FINRA OATS and CAT requirements.

Frontend

• React / Next.js
• TypeScript
• TradingView Lightweight Charts
• TradingView Advanced Charts

Backend and Execution

• Node.js
• Python / FastAPI / Django
• Go (high concurrency)
• C++ (low-latency execution)

Trading Integrations

• MetaTrader 5 (MT5)
• TradingView Webhooks
• Pine Script Bridges
• Interactive Brokers TWS
• Alpaca API
• FIX Protocol

Real-Time and Data

• WebSockets
• Apache Kafka
• Redis Pub/Sub
• PostgreSQL
• TimescaleDB
• MongoDB

Mobile

• React Native
• Flutter
• Swift (iOS native)
• Kotlin (Android native)

Cloud and Infrastructure

• AWS / Azure / GCP
• Auto-scaling groups
• Docker / Kubernetes
• Co-location options

Payments and KYC

• Stripe / Plaid
• Plaid
• Onfido / Jumio / Sumsub
• Wise / Payoneer

Security

• JWT / OAuth2
• End-to-end encryption
• HSM key management
• Pen testing standard

Brokerage and Commission

Per-trade flat fees or percentage commissions with minimum ticket sizes. Tiered schedules rewarding active traders. Commission is calculated and deducted at order fill time, posted to a commission ledger visible in trade confirmations and account statements.

Spread-Based Revenue and PFOF

Bid-ask spread capture is standard in forex CFD platforms. Payment for Order Flow (PFOF) is legal in the US but prohibited in the UK under SEC rules. Revenue architecture must account for this geographic variation from the start, as routing logic and disclosure requirements differ materially by jurisdiction.

Subscription and Premium Tiers

Freemium with real-time data, Level 2 order book, AI screeners, and API access gated behind monthly or annual tiers. Pricing from USD 10 to USD 60 per month for retail platforms. Requires Stripe subscription management, feature flag logic per tier, and grace period handling for failed payments.

Prop Firm Challenge and Funded Account Revenue

Challenge fees from USD 100 to USD 1,000 per evaluation attempt, with the majority of participants not passing on the first attempt, making repeat fees a significant revenue component. Funded accounts generate revenue from the profit split (10% to 30% of trader profits). The back-office platform must enforce drawdown rules, automate pass/fail processing, and handle payout disbursements across thousands of simultaneous traders.

Margin, Leverage and Interest Income

Overnight financing rates on leveraged positions (charged as a percentage above SOFR benchmark), interest on uninvested cash balances held at bank, and margin lending rates. For a platform with USD 100M in aggregate leveraged positions, even a modest financing spread generates significant annual revenue without any direct user transaction. Both revenue streams require regulatory permissions and SEC customer protection rule compliant client money segregation.

Discovery and Compliance Scoping

Core purpose, regulatory obligations, architecture outline, compliance requirements matrix, and fixed price. No design or development begins without a completed discovery phase.

Architecture and Data Feed Design

Full system architecture: OMS state machine, real-time data pipeline, compliance logging, and infrastructure topology. Data provider selection evaluated against asset class, latency, and budget.

UI/UX Design and Prototyping

Interactive Figma prototypes usability-tested with representative users. Information density, scan speed, and error prevention take precedence over minimalism in trading UI design.

Development and Integration

Sprint-based delivery with fortnightly releases to staging. Broker API and data feed integrations run in parallel with feature development to avoid bottlenecks at project end.

QA, Security and Load Testing

Penetration testing by specialist before any platform handles real funds. Load testing simulates realistic concurrent users during peak market conditions. Exhaustive edge case coverage for OMS order lifecycle.

Deployment and Hypercare

Go-live checklist: monitoring, alerting, backup verification, rollback procedures. Two-week hypercare with dedicated engineering support during market hours. Most clients continue with Lycore for post-launch iteration.

Fintech Domain Experience

Over 20 years building financial software across brokerage, prop firm, payments, and investment management. We know the compliance obligations, the data provider landscape, and the broker integration patterns before discovery starts.

Fixed Price After Discovery

Fixed price issued after a thorough discovery phase. No scope changes without explicit client approval. No surprise invoices. Anyone quoting a firm price for a trading platform without discovery is guessing.

Senior Engineers Throughout

The engineers scoping your project are the engineers building it. We do not staff with junior developers managed by a senior who appears in the sales process. Every engineer on a Lycore trading build has production experience in financial software.

Compliance Embedded from Day One

Compliance is an architecture input, not a post-development audit. KYC data handling, audit logging, transaction reporting, and data retention are designed into the system from the discovery phase. Retrofitting compliance is always more expensive than building it correctly the first time.

You Own Everything

All source code, IP, infrastructure credentials, and documentation assigned to you at the point of creation. No licensing fees, no proprietary frameworks, no vendor lock-in. Standard in every Lycore engagement.

Post-Launch Support

Two-week hypercare after every launch with dedicated engineering support during market hours. Most trading platform clients continue with Lycore for iterative feature development and infrastructure management.

Custom Build

• +Full control over features, UX, and product roadmap
• +You own all user data, trading data, and infrastructure
• +Scalability designed for your specific traffic profile
• +Lower total cost of ownership beyond 3 to 4 years vs per-user licensing
• –Higher upfront development cost and longer time to market
• –Requires ongoing engineering resource for maintenance and iteration

White-Label Platform

• +Faster time to market, sometimes weeks rather than months
• +Lower upfront cost with licensing fees spread over time
• +Infrastructure and uptime managed by the vendor
• –Feature roadmap controlled by vendor, not by your users
• –User and trading data held by vendor under their terms
• –Licensing costs scale with users, eroding margins as platform grows

How much does it cost to build a stock trading app?

Cost depends on the type of trading software you are building. A standalone algorithmic trading bot, Pine Script to execution bridge, or MT5 Expert Advisor with a lightweight web dashboard typically starts at USD 10,000 to USD 25,000. A focused retail brokerage or prop firm MVP with order execution, real-time price feeds, KYC onboarding, and admin tools typically costs USD 25,000 to USD 100,000. More complex builds including options platforms, social copy trading systems, or institutional platforms with FIX protocol connectivity typically cost USD 100,000 to USD 200,000 or more. Lycore provides a fixed price after a thorough discovery phase. We do not issue estimates without understanding scope in detail.

How long does stock trading app development take?

A focused MVP trading platform with a defined feature set and single broker API integration typically takes 16 to 24 weeks from start of development to production launch, following a two to four week discovery phase. The most common sources of timeline risk are broker and data provider API access: some brokers require a formal application process and compliance reviews before granting API access, which can add four to eight weeks. MT5 Manager API access for prop firm builds and institutional FIX API access are two specific examples where early initiation of the access request is critical. Lycore identifies external dependencies in discovery and builds their timelines into the project plan.

Can you integrate with MetaTrader 5, Interactive Brokers, or Alpaca?

Yes. Lycore has built integrations with MetaTrader 5 via the Manager API and bridge interfaces, Interactive Brokers via the TWS API and Client Portal API, and Alpaca for US equity trading. MT5 Manager API access requires a relationship with an MT5 licensed broker and carries licence costs depending on the deployment model. Interactive Brokers TWS API requires an active IB account and operates via a locally running TWS or IB Gateway application, which has implications for the backend deployment architecture. Alpaca provides a clean REST and WebSocket API for US equities with no special access requirements beyond account registration, making it the lowest-friction option for platforms targeting US markets. We evaluate the right broker integration approach during discovery based on target asset class, geographic market, user volume, and compliance structure.

Can you build just a trading bot or algo strategy without a full platform?

Yes. Not every trading software project requires a full brokerage platform. Lycore builds standalone algorithmic trading systems as scoped, fixed-price engagements. Common examples include a Pine Script strategy running on TradingView that emits webhook signals to a custom execution server connected to Interactive Brokers or Alpaca; a MetaTrader 5 Expert Advisor with a web-based performance dashboard showing P&L, drawdown, and trade history; a Python-based backtesting and live execution bot using a broker REST API with a lightweight reporting interface; and prop firm challenge automation scripts with real-time risk enforcement logic. These projects typically scope to USD 10,000 to USD 25,000 depending on broker integration complexity, the number of instruments, and whether a reporting dashboard is required. A discovery call is still the starting point even for smaller builds, since the integration specifics and data feed requirements need to be confirmed before a fixed price can be issued.

How do you handle SEC and FINRA compliance during development?

Compliance is handled as an architecture input, not a post-development audit. During discovery, Lycore conducts a compliance scoping exercise identifying applicable regulatory frameworks, technical obligations (KYC/AML integration, audit log specifications, transaction reporting formats, data retention periods, client money handling rules), and the licensing structure in place. We do not provide legal or regulatory advice and recommend all clients engage a specialist compliance consultant. What we do is translate compliance obligations into technical requirements built into the platform architecture from the start. For SEC and FINRA regulated platforms this includes SEC Rule 15c3-3 customer protection rule compliance, FINRA transaction reporting capabilities, and audit trail implementations meeting SEC and FINRA record-keeping requirements.

Building a Stock Trading App? Talk to Lycore.

Stock trading app development rewards experience, domain knowledge, and engineering discipline above everything else. We scope it accurately, build it correctly, and support it after launch.

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