echoSignals case study — cloud copy trading for MT4/MT5, from idea to priced product.

Why we built it

Copy trading usually fails on the follower's side: a VPS to rent, a terminal to install, an EA to configure, and a support ticket every time something drifts. We wanted a service where the follower subscribes, connects an account, and everything else runs in our cloud.

Architecture

Each tenant — a signal provider or a white-label reseller — gets isolated products, masters and subscribers. Master accounts run on cloud terminals we provision automatically; trades are captured at the source, normalised, scaled per subscriber (fixed lot, multiplier or risk-based) and routed to follower terminals over SignalR. A .NET service layer owns accounts, entitlements, billing and the partner tree; a React dashboard sits on top for providers, subscribers and resellers.

What was hard

• Zero-setup provisioning. A terminal that installs, logs in, attaches the copier and reports health without a human, and repairs itself when the broker server restarts.
• Lot scaling. Followers with different balances, leverage and broker contract sizes need the same relative exposure — with symbol-suffix mapping and minimum-lot rounding that never turns a small account into an oversized one.
• Tenancy. Resellers must never see each other's subscribers; providers must never see each other's masters. Scopes are enforced in the data layer, not the UI.
• Latency. Master to follower in the same second, across brokers, with retries that do not double-fill.

What it became

A priced product — an entry membership and per-platform subscriptions — with strategies monitored 24/5 and a white-label programme for brokers, educators and signal providers. DXtrade and cTrader connectors are in development. It is also the reference implementation we bring to every client copy-trading build: the tenancy model, the scaling rules and the provisioning are already proven.