Direct answer
cTrader Copy is a system that copies trading activity from one account to another. Instead of manually placing each trade, a follower account attempts to place matching trades (or equivalent orders) according to the copy settings, using the execution environment of the follower’s trading account.
How it works (mechanism)
At a high level, a “copy” feature creates a link between a source account (the one being followed) and a follower account (the one executing the copied trades). When the source account opens or closes positions, the platform’s copy engine translates those actions into follower actions.
In practice, several inputs determine what the follower actually does:
- Account link and activation: copying starts and stops based on the user’s chosen start/stop behavior.
- Position sizing rules: followers often scale trade size (for example, by a fixed amount or a multiplier) so exposure can differ from the source.
- Order/position mapping: the copy system needs a way to match trade intent, such as converting source actions into follower orders.
- Timing and execution constraints: market and execution conditions at the follower account may differ from the source.
This means “copying” is not identical to “replaying the same outcome.” Even if the same instrument is involved, the follower can end up with different entry prices, partial fills, or different order outcomes.
Evidence or example (what to check)
Consider a simple, assumption-based example with no real-time data:
- Assume the source opens a trade at time T1 with a given direction and intended size.
- The copy engine receives the action and sends equivalent instructions to the follower.
- The follower’s execution happens at a later moment, T2, after network and processing delays.
Even if both accounts trade the same market, the prices available at T2 can differ from those at T1, and transaction costs can differ between accounts. As a result, the follower’s realized profit or loss can diverge from the source’s, despite the “copy” objective.
To independently verify claims about copying behavior, focus on reproducible items:
- The documented rules for how size is scaled.
- How the platform handles partial fills or execution delays.
- How copying behaves on shutdowns, disconnections, or unsupported actions.
Limitations and risks (material failure modes)
Copying does not eliminate risk. Some common limitations include:
- Market-condition mismatch: differences in execution timing and available liquidity can change outcomes.
- Cost and spread effects: transaction costs and execution quality affect both entries and exits.
- Scaling and constraint behavior: if scaling rules cause minimum sizes, margin constraints, or leverage limits to trigger, copied trades may be rejected or sized differently.
- Action mapping gaps: some actions may not translate cleanly (for example, certain order types or complex management behaviors).
A key failure mode is that the follower can be placed into a different practical state than the source (due to constraints or execution differences). Another is that losses from the source can be transferred to the follower when copying is active.
Verification and next question
The most reliable way to understand a specific cTrader Copy setup is to verify the documented copy settings and mapping rules in the platform’s own documentation, then test the implications using assumptions (and, if available, historical scenarios) while explicitly including costs and execution differences.
If you want, describe the exact copy settings you are considering (for example, sizing/scaling approach and copy start/stop behavior), and the question can be narrowed to what those settings change in trade outcomes.