Separate account records from decisions
A trade copied to five accounts creates five account records. Total results include all actual gains, losses and costs. Yet evaluating the trading idea may involve only one decision and a shared market context. Both views are useful, but they answer different questions.
Make the aggregate calculation explicit
Suppose one decision produces net results of +USD 100, +USD 80 and −USD 20 across three accounts. The combined balance is +USD 160. That does not erase the third account’s loss. Check quantity, fills, costs and partial executions before attributing the difference to the strategy.
Keep deposits and withdrawals separate from trading P&L. Do not aggregate different currencies without documented conversion. Preserve the original contract so that a micro is not accidentally weighted as a mini.
Use a consistent review sequence
First reconcile each account with its export. Then use a common period for the combined view. Examine account contribution and costs before segmenting by setup. Explicitly identify copied decisions in the review: execution count alone does not measure independent evidence.