# not_supported_on_mt4

> MetaTrader 4 doesn't support this.

Source: https://tickwire.io/docs/errors/not_supported_on_mt4/

HTTP 400, 501. Nothing reached the broker.

**Likely cause:** Market depth, tick history, stop-limit orders, OrderCheck and other MT5-only features.

**What to do:** Use an MT5 account for this feature. 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.