# DXtrade order rejection reason: OrdRejReason 6 DUPLICATE_ORDER

Independent and unofficial. Not affiliated with or endorsed by any broker or platform named here. Educational only: nothing here is advice, and nothing here recommends a broker or a trade.

This is the markdown version of https://openbrokerapi.com/errors/dxtrade/ordrejreason-6, written from the same records as that page.

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

The error, as text you can copy:

```
OrdRejReason 6 DUPLICATE_ORDER
```

- Kind: Order rejection reason
- Where you meet it: In the rejection the API reports, not in the HTTP status
- API: [DXtrade APIs](https://openbrokerapi.com/platforms/dxtrade)
- Status: verified. Source: [demo.dx.trade](https://demo.dx.trade/developers/#/DXtrade-FIX-Trading-API), checked 2026-10-09.

## What does OrdRejReason 6 DUPLICATE_ORDER mean on the DXtrade API?

In the DXtrade FIX Trading API, DUPLICATE_ORDER is value 6 of the OrdRejReason (103) field, which the vendor says is present only on rejected orders. The vendor's page lists the value by name and gives it no further description. The vendor adds that DUPLICATE_ORDER means a duplicate ClOrdId (11) value.

## How do I fix OrdRejReason 6 DUPLICATE_ORDER?

Send a ClOrdId (11) value that has not been used before.

## More on the DXtrade API

- [All DXtrade API error codes](https://openbrokerapi.com/errors/dxtrade)
- [DXtrade API error codes](https://openbrokerapi.com/errors/dxtrade): 79 decoded, each with what it means, and the fix where the source gives one.
- [DXtrade API endpoints](https://openbrokerapi.com/platforms/dxtrade/endpoints): 21 documented, each with its method, path, parameters and source.
- [DXtrade messages](https://openbrokerapi.com/platforms/dxtrade/messages): 8 documented, each with its fields and source.
- [DXtrade API page](https://openbrokerapi.com/platforms/dxtrade): The full record: access, authentication, limits and the source for each.

## Licence and how to cite

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Cite as: DXtrade order rejection reason: OrdRejReason 6 DUPLICATE_ORDER. Broker API Hub, https://openbrokerapi.com/errors/dxtrade/ordrejreason-6, newest check 2026-10-09.

Where you rely on a single figure, cite the source and the checked date printed beside it as well. Where this page and a broker's own documentation differ, the documentation wins.