invalid_symbol
Signal webhook: the alert's symbol is not a symbol name.
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) in Errors. Send the error’s requestId to support and we can find the request.