Death Cross — Trading Wiki

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Published by TradeHQ. Site creator: Anuga Weerasinghe. This page has no recorded editorial review date; the About page explains the site's editorial approach.

What Death Cross means

A death cross labels a shorter moving average crossing below a longer one, often the 50-day below the 200-day. This is a lagging price calculation, not confirmation of a future decline.

In depth

A death cross labels a shorter moving average crossing below a longer one, commonly a 50-day average below a 200-day average. It describes the relationship between selected historical averages. It need not identify the beginning of a decline, and a later recovery can reverse the crossover. The slope of either average is another historical observation, not a universal measure of signal strength. Do not infer how professional managers position portfolios from this label. To evaluate an imagined rule, specify the series, frequency, execution assumptions and comparison period before inspecting outcomes.

Include costs and both continuation and recovery cases.

Key points

• 50-day MA crossing below the 200-day MA triggers the signal
• A description of selected historical prices, not a validated prediction of a downturn
• Compare price and volume observations without assuming confirmation predicts returns

Why it matters when you are learning

Mark when the selected averages cross, then compare later continuations and reversals. Recognising a historical crossover does not guarantee protection from a future decline.

Worked exercise and its limits

Construct two hypothetical paths with the same downward moving-average crossover: one recovers and one continues falling. The common crossover cannot distinguish their futures. Explain the delay caused by averaging old prices.