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Case Studies Trading Platform Modernisation
Retail Brokerage · Platform Modernisation

They Switched from Legacy Platforms and Tripled Their Growth

How a mid-size brokerage escaped MT4/MT5 dependency and unlocked a new era of client retention and revenue.

3x
Trader Retention
+30%
Active Accounts
+45%
Revenue Growth
The Problem

Their Platform Was Working Against Them — Not For Them

Prime Brokers Ltd was built on third-party terminals like MT4/MT5. As the market evolved, those platforms became a liability: the web interface looked dated, traders demanded multi-asset access and mobile trading, and EA-driven behaviour distorted P&L.

Worse still, the brokerage had no control over branding or user experience and struggled to differentiate itself. Internal analysis showed the toll of doing nothing: they were losing hundreds of active traders every year and their dealing desk spent most of its time mitigating automated trades rather than helping clients.

Outdated Web UI
Traders found the interface clunky and dated versus modern fintech apps
EA-Driven P&L Distortion
Automated trading behaviour created unpredictable exposure and losses
Zero Brand Control
White-label constraints left no room to differentiate or own the UX
Cost of Inaction

Every Month They Waited, the Bill Got Bigger

The numbers were stark. An outdated platform forced traders to look elsewhere, eroding the active user base by hundreds of accounts and stripping out recurring revenue. If nothing changed, the business would have continued bleeding capital and clients.

Monthly Bleeding — Before Spencer Logic

Lost Trading Revenue
$10,000 – $30,000
P&L Volatility from Uncontrolled EAs
$10,000 – $50,000
Wasted Marketing Spend
$5,000 – $20,000
License Fees & Infrastructure Overhead
Additional thousands
The Solution

One Platform to Replace Three — and Outperform All of Them

Spencer Logic introduced Spencer Trader, a modern, browser-based trading platform built to replace MT4/MT5 dependencies entirely.

Multi-Asset Trading
A single interface for FX, CFDs, metals, equities and crypto — no more switching terminals.
Ultra-Fast Execution
Sub-millisecond order processing and low latency routing via Spencer's liquidity aggregation engine.
TradingView Charts & Custom Layouts
Rich charting with 100+ indicators, drawing tools and drag-and-drop widgets for personalised workspaces.
Cross-Platform Access
A progressive web app delivering a consistent, native-quality experience across desktop, tablet and mobile.
Enterprise APIs & White-Label Flexibility
FIX/REST/WebSocket APIs and full control over branding — own your UX, own your brand.
Add-On Solution

Invest Social: The Network Effect Engine

The brokerage also adopted Invest Social to offer PAMM/MAMM and copy-trading. A transparent strategy marketplace with real-time performance metrics allowed investors to follow top traders, while brokers maintained full oversight and set custom risk limits.

The Results

Within Months, the Numbers Spoke for Themselves

Within months of launching Spencer Trader and Invest Social, Prime Brokers saw the results they hoped for. Client churn reversed, execution quality improved, and the brokerage finally owned its brand.

+30%
Active Accounts

Client churn reversed as traders embraced the modern UX and mobile access.

↓ Hedging
Execution Quality

Sub-millisecond latency and deeper liquidity eliminated unnecessary hedging spend.

3x
Trader Retention

Modern UX and social trading kept traders engaged, active, and referring others.

Full Control
Brand & UX Ownership

With a white-label platform, Prime Brokers became the brand — not just a reseller.

"

Spencer Trader allowed us to scale from 500 to 8,000 active traders in just 6 months without any performance degradation.

JD
James Davidson
CTO, Prime Brokers Ltd