# How trades are performed

**The following steps are performed to copy trades:**

### 1. Assemble Transaction:

• Assembles the transaction using the Odos service, including details like input and output tokens.

### 2. Update Database with Transaction Details:

• Updates the database with transaction details, including input and output token information.

### 3. Simulation Check:

• Checks the success of the transaction assembly simulation. If unsuccessful, updates the transaction status and logs the simulation error.

### 4. Trade Integrity Check:

• Validates the trade against the vault's price thresholds to ensure transaction integrity.

### 5. Execute Transaction:

• Executes the transaction, copying the trade on the blockchain.