How duplicate detection works

Why you can safely re-import the same statement any time.

You can re-import the same statement, or overlap date ranges, as often as you like — Ledger of Alpha won't double-count.

How it decides

  • Each imported trade carries a stable identifier derived from its broker execution IDs (or, for mapped CSVs, from its key fields).
  • On import, trades that match one already in your account are skipped, not duplicated.
  • The preview and import summary tell you how many rows were imported vs. skipped as duplicates.

Your edits are safe

Because matching trades are skipped rather than overwritten, any journaling, ratings, or notes you added to an existing trade are preserved through a re-import.

More in Importing & brokers

Importing a CSV fileTimezones: what clock your trade times are onImporting from Tradovate and TopstepXImporting from any broker with column mappingThe CSV import templateAutomatic broker syncConnecting each broker for auto-syncFixing a broker connection that stopped syncingSupported brokers

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Answers come from the Help Center articles on this site — it can explain how the app works, not how to trade.

Answers are generated from Help Center articles and can be incomplete. contact us

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How duplicate detection works — Ledger of Alpha Help