How do you interpret a sudden price spike?

A spike has a story: a data release, a headline, a central banker speaking, a fat-finger order, or intervention. The spike itself tells you nothing about which one it was — and the correct response depends entirely on the cause.

What's your spike routine?

• how you find out what caused it
• whether you trade the spike or wait
• the spike that taught you the most

The intervention guide covers one class of spikes, and the calendar explains most of the others.