> For the complete documentation index, see [llms.txt](https://docs.trada.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trada.io/getting-started/core-concepts.md). # Core concepts The core vocabulary used across Trada — copier, sender, receiver, partner account, working hours, protection, and the Trading Health Score. A short reference for the terms used throughout these docs. The [Glossary](/reference/glossary.md) carries the full list.
A copier connecting one sender to several receivers

A copier connects one sender to many receivers — one market type per copier.

## Copier A **copier** connects one **sender** account to one or more **receiver** accounts, plus the shared rules that apply to them — working hours, and which symbols copy (switched on or off at **Map Symbols**, for all receivers at once). When the sender opens, modifies, or closes a trade, the copier replicates that action to each receiver according to its own settings. A copier's receivers must be in the same market as its sender. Every account you can connect today is a Forex or CFD account. ## Sender The **sender** is the master account a copier copies *from*. Each copier has exactly one sender. Every trade on the sender triggers a copy operation to the receivers. ## Receiver A **receiver** is a follower account a copier copies *to*. A copier can have many receivers, and each carries its own independent settings: lot sizing, stop-loss and take-profit handling, and risk protection. The same account can be a receiver in several copiers, and an account can be a sender in one copier while being a receiver in another — but never both within the same copier. ## Partner account A **partner account** is an account you hold with one of Trada's partnered prop firms or brokers. It counts toward your plan's account limit and looks the same as any other account. Connecting one can grant you that partner's plan, once, at no cost. See [Partner accounts & offers](/connecting-accounts/partner-accounts.md). ## Working hours **Working hours** are a per-copier schedule that restricts when trades copy. You define one or more time blocks per day; outside them, no new trades are copied. Optionally, open positions can auto-close when a working-hours period ends. ## Protection **Protection** is a set of per-receiver limits and automated actions. You set Daily and Overall loss/profit limits (in % or $), and choose what happens when one is reached: close the positions the copier opened on that receiver, stop the whole copier, or both. You can also cap how many positions the receiver holds at once. See [Risk protection](/copy-trading/configure-receiver/risk-protection.md). ## Trading Health Score The **Trading Health Score** is a 0–100 composite that averages six normalised sub-scores: drawdown, profit factor, win rate, reward-to-risk, expectancy quality, and winning days. It summarises how a process is running, not what it returns. See [Trading Health Score](/reports-and-analytics/health-score.md). ## Related * [What is Trada](/getting-started/what-is-trada.md) * [How copy trading works](/copy-trading/copy-trading.md) * [Glossary](/reference/glossary.md)