# volume_required

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

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

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)](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.