> ## Documentation Index > Fetch the complete documentation index at: https://docs.vortexiq.ai/llms.txt > Use this file to discover all available pages before exploring further. # Funnel Conversion Drop (>5pp in 24h), PostHog > Funnel Conversion Drop (>5pp in 24h) for PostHog stores. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it. **Card class:** [Hero](/nerve-centre/overview#card-classes-explained) • **Category:** [Analytics](/nerve-centre/connectors#connectors-by-type) ## At a glance > **Funnel Conversion Drop (>5pp in 24h)** is a Nerve Centre alert tracked from PostHog funnel data. It fires when your primary funnel's end-to-end conversion rate falls by more than 5 percentage points inside a 24-hour window. A swing that large overnight is rarely organic; it usually points to a broken step, a deploy regression, or a tracking failure. This is one of the earliest revenue-at-risk signals PostHog can give you. | | | | --------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **What it counts** | Alert events raised when primary funnel conversion drops more than 5 percentage points within 24 hours. | | **Sample type** | Backend API data from PostHog funnel insights, evaluated against the alert rule on each refresh. | | **Why it matters** | A sudden funnel drop is a leading indicator of lost orders. Catching it within 24 hours, rather than at month-end, is the difference between a quick fix and a quarter of leakage. | | **Reading the value** | A non-zero count means the rule fired. Open the alert to see which step moved and when. | | **Currency** | count | | **Time window** | `RT` | | **Alert trigger** | `primary funnel conversion down >5pp in 24h` | | **Sentiment key** | `ph_alert_conversion_drop` | | **Roles** | owner, marketing | ## Calculation Calculated automatically from your PostHog data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading. ## Worked example *A representative reading of **Funnel Conversion Drop (>5pp in 24h)** for a typical merchant on PostHog.* Suppose your view-to-purchase funnel sat at 3.4% conversion all month, then dropped to 1.9% within a day of a checkout deploy on 14 Mar 26. That is a 1.5pp drop, which would not trip the rule, but a drop from 8.1% to 2.4% on a smaller funnel would. When the card shows an alert, open it, identify the step that lost volume, and cross-reference Biggest Funnel Step Drop-off to localise the break. For deeper investigation, use Vortex Mind to trace upstream causes; for natural-language exploration, ask Ask Viq. ## Sibling cards merchants should reference together | Card | Why merchants reach for it | | ----------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------- | | [`ph_funnel_conversion`](/nerve-centre/kpi-cards/posthog/primary-funnel-conversion) | Funnels sibling: the conversion rate this alert watches. | | [`ph_funnel_dropoff`](/nerve-centre/kpi-cards/posthog/biggest-funnel-step-drop-off) | Funnels sibling: which step is bleeding the most. | | [`ph_alert_event_volume_drop`](/nerve-centre/kpi-cards/posthog/event-volume-drop-25-vs-baseline) | Nerve Centre sibling: event volume collapse alert. | | [`ph_alert_tracking_broken`](/nerve-centre/kpi-cards/posthog/event-tracking-broken-core-event-stopped-firing) | Nerve Centre sibling: core event stopped firing. | | [`ph_xc_funnel_vs_ecom_conversion`](/nerve-centre/kpi-cards/posthog/posthog-funnel-conversion-vs-ecom-conversion) | Cross-channel sibling: funnel vs platform conversion. | ## Reconciling against the vendor's own dashboard **Where to look in PostHog's own dashboard:** Open your primary funnel insight in PostHog and switch to the trend view to see conversion by day. The 24-hour drop the alert fired on should be visible as a step change. Confirm the funnel steps and conversion window match the profile configured in Vortex IQ. **Why the Vortex IQ value may legitimately differ:** | Reason | Direction | What to do | | ---------------------------------------------------------------------------------------------------------- | --------- | ------------------------------------ | | **Conversion window.** PostHog funnels allow a configurable conversion window; a mismatch shifts the rate. | Variable | Match the conversion window setting. | | **Funnel definition.** The steps Vortex IQ watches may differ from the funnel you are viewing. | Variable | Confirm the same funnel is selected. | | **Low-volume noise.** On small funnels, a few sessions swing the percentage hard. | Variable | Check the underlying step counts. | **Cross-connector reconciliation:** complement with sibling cards in the same category for the full diagnostic picture. For divergence investigations, use Vortex Mind. ## Known limitations / merchant FAQs **Q: How often does Funnel Conversion Drop (>5pp in 24h) update?** The card refreshes on the standard data refresh (typically every 30-60 minutes for live integrations). For real-time signals, force a manual refresh from the dashboard. **Q: Why did the alert fire when conversion looks fine now?** The rule watches a 24-hour window. A transient drop, for example during a brief checkout outage, can fire and then recover. The alert is still useful as evidence of the incident window. **Q: Will a low-traffic funnel trigger false alarms?** It can. On small funnels a handful of sessions moves the percentage by more than 5 points. Tune sensitivity per profile so the rule reflects your real traffic volume. **Q: Can I customise the alert threshold?** Yes, sensitivity thresholds are configurable per profile in the Sensitivity tab. Adjust to match your business baseline rather than relying on the generic default. *** ### Tracked live in Vortex IQ Nerve Centre *Funnel Conversion Drop (>5pp in 24h)* is one of hundreds of KPI pulses Vortex IQ tracks across PostHog and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. [Start for free](https://app.vortexiq.ai/login) or [book a demo](https://www.vortexiq.ai/contact-us) to see this metric running on your own data.