ECB Event

ECB events are among the most predictable high-impact news events on the EA-deployment calendar. The 8 scheduled meetings per year follow a fixed cadence; the announcement times are known weeks in advance; the impact is consistent. Despite this predictability, retail EAs often don't implement adequate news filters around ECB events.

ECB event structure:

• **Interest-rate decision announcement (12:45 UTC, Thursday after meeting)**: short statement releasing the rate decision; if rates change unexpectedly, immediate 50-100 pip move on EURUSD • **Press conference start (13:30 UTC, same Thursday)**: 45-minute press conference where ECB President takes questions; entire window produces continuous volatility with 100-200 pip ranges possible • **Q&A volatility peaks**: specific question topics (forward guidance, asset-purchase programs, regional concerns) trigger immediate spikes during the press conference

Impact on EA execution:

• **EURUSD spread widening**: typical 0.1-0.3 pip raw spread expands to 1.0-3.0 pips during the announcement window; scalping strategies break-even disappears • **Slippage on EUR-quote pairs**: market orders during the announcement experience 5-20 pip slippage as bid-ask gaps temporarily exceed typical levels • **Stop-hunt patterns**: rapid price spikes trigger stop-losses that wouldn't normally be hit; positions get closed at unfavourable prices • **EUR-correlation pair impact**: EUR/GBP, EUR/JPY, EUR/CHF all experience volatility expansion during ECB events; not just EUR/USD

For EA buyers: vendors should disclose news-filter behaviour around ECB events. The expected behaviour: EA stops opening new positions 15-30 minutes before scheduled ECB events and resumes 15-30 minutes after the press conference concludes. EAs without ECB event filters experience 2-5× normal slippage and unfavourable execution during these periods, materially eroding edge.