# symbol_required

> Signal webhook: the alert has no symbol.

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

HTTP 400. Nothing reached the broker.

**Likely cause:** The alert message has no symbol field.

**What to do:** Add `"symbol": "{{ticker}}"` to the alert message. 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.