# not_supported_on_mt5

> MetaTrader 5 can't do this.

Source: https://tickwire.io/docs/errors/not_supported_on_mt5/

HTTP 400, 501. Nothing reached the broker.

**Likely cause:** An MT4-only feature asked of an MT5 account.

**What to do:** Use the MT5 equivalent. Nothing was sent.

**Retry:** No. The same request gets the same answer; change something first.

Listed under [Market data and platform support](https://tickwire.io/docs/errors/#market-data-and-platform-support) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.