volume_required

Signal webhook: the alert has no size and the webhook has no default lots.

HTTP 400. Nothing reached the broker.

Likely cause: No lots, risk_pct or risk_money in the alert, and no default lots on the webhook.

What to do: Send a size in the alert, or set default lots on the webhook. 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.