# invalid_symbol

> Signal webhook: the alert's symbol is not a symbol name.

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

HTTP 400. Nothing reached the broker.

**Likely cause:** The symbol field is empty or holds characters a symbol can't have.

**What to do:** Send `"symbol": "{{ticker}}"`, or the broker's symbol name. Nothing was sent.

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

Listed under [Signal webhooks (TradingView)](https://tickwire.io/docs/errors/#signal-webhooks-tradingview) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.