Tradecopia's job is to detect trades on your leader account and send matching order instructions to your follower accounts. Once that instruction leaves Tradecopia, your broker takes over — everything that happens next is determined by the broker, not by Tradecopia.
You might need this article if:
Your follower filled at a different price than your leader and you want to understand why
A follower order was rejected and you're not sure whether that's a Tradecopia issue or a broker issue
You want to understand what Tradecopia can and cannot influence before troubleshooting a replication problem
You're comparing fill quality or execution speed across accounts on different brokers
What Tradecopia does
Tradecopia monitors your leader account for executed trades. When a fill is detected, Tradecopia sends a matching order instruction to each follower account in your copy group.
That is the full scope of Tradecopia's role in any given trade:
Detect the fill on the leader
Send the order instruction to each follower's broker
Tradecopia does not place trades on its own initiative, hold account balances, or influence how orders are processed once they reach a broker.
What your broker does
From the moment Tradecopia's order instruction arrives at your broker, execution is entirely in the broker's hands. Your broker controls:
Fill price — determined by the broker's execution engine and available liquidity at the moment the order arrives
Fill speed — how quickly the order is processed
Order acceptance or rejection — whether the broker accepts the order at all, based on margin, account permissions, and prop firm rules
Partial fills — whether the full quantity is filled or only part of it
Commission and exchange fees
Account balance management
These outcomes can differ between your leader and follower accounts even when both receive the same instruction at the same time. Each broker operates its own independent execution infrastructure.
The three-layer responsibility model
Every trade involves three layers, each owned by a different party:
Layer | Owner | What happens here |
Replication | Tradecopia | Detects the leader fill; sends the order instruction to follower brokers |
Execution | Your broker | Receives the instruction; fills, rejects, or partially fills the order |
Final outcome | The market | Price, slippage, and volatility at the moment of execution |
Tradecopia operates only at the replication layer. The broker and market layers are outside its control.
Common causes of unexpected outcomes
When something looks wrong after a trade copies, the cause almost always falls into one of four categories — all of which are outside Tradecopia's control:
Market movement
The market moved between the moment the leader filled and the moment the follower's broker received and processed the instruction. Slippage and fill price differences are a property of market execution, not replication.
Broker-side behaviour
Each broker has its own execution engine, liquidity access, and order processing rules. One broker may fill an order while another rejects it. One may fill faster, at a slightly different price, or with a partial fill. These differences exist independently of Tradecopia.
Connection interruptions
On the desktop Pro plan, if the Tradecopia application closes or loses its connection while you are trading, replication pauses for that window. Any trades placed during the interruption are not copied retroactively. On cloud plans (Pro+ Lite and Pro+), your instance runs continuously — connection interruptions on your local machine do not affect replication.
Unsupported order types
Certain order types — for example, bracket orders or stop-limit combinations — may not replicate cleanly across all brokers. If a follower broker does not support an order type used on the leader, the instruction may fail silently or be converted to a different order type. See Why didn't my trade execute as expected? for specific root causes.
Related articles
How does Tradecopia copy trades between accounts? — the step-by-step replication process
Why didn't my trade execute as expected? — specific root causes when execution doesn't match expectations
Why do my follower accounts drift when I modify a limit or stop order near market price? — an example of broker-controlled execution timing