On This Page
Key Takeaways
- A conventional death cross moves the 50-day average below the 200-day average after the prior close was at or above it.
- The crossing event changes the short-minus-long spread from nonnegative to negative.
- Read the crossing alongside each line’s slope, price position and nearby swing levels.
- The golden cross is the mirror event, with the 50-day crossing back above the 200-day.
- Specify periods, price input, interval and average type. Different configurations can produce different crossing dates.
- Define whether the event triggers an entry, changes position exposure or qualifies a separate setup.
What is a death cross?
A death cross is a bearish moving average crossover that occurs when a shorter moving average moves below a longer one. The conventional daily pair is the 50-day and 200-day moving averages, so the event happens on the session when the 50-day falls below the 200-day after being at or above it at the prior close.
For a close-based SMA rule, require SMA50 below SMA200 now and SMA50 at or above SMA200 at the previous close. The event occurs on one bar; the below-average state continues while the spread remains negative.
A golden cross is the upward counterpart.
Formula
Death cross on day t when SMA50(t) < SMA200(t) and SMA50(t−1) ≥ SMA200(t−1)- SMA50 is the arithmetic mean of the last 50 selected prices, normally daily closes.
- SMA200 is the same calculation over the last 200 prices.
- The condition on day t-1 is what makes the event a crossing rather than a persistent state.
- Exponential averages use different weights. Changing the type can change the signal date; the complete price path determines the result.
Death cross example with 50-day and 200-day SMAs
XYZ peaked at $132 in March and has trended lower for three months. A trader tracks the 50-day and 200-day simple moving averages of the daily close.
- Prior session: 50-day SMA $117.87 versus 200-day SMA $117.80, a spread of positive $0.07
- Signal session: the new close of $109.80 replaces a $124.80 close leaving the window, so the 50-day SMA falls $15.00 / 50 = $0.30
- Signal session: the last 50 closes sum to $5,878.50, so the 50-day SMA is $5,878.50 / 50 = $117.57
- The 200-day SMA drops from $117.80 to $117.77 when the $109.80 close replaces $115.80: ($109.80 − $115.80) / 200 = −$0.03
- Price on the signal session is $109.80, already 16.8% below the $132 high
The 50-day SMA finishes at $117.57 and the 200-day at $117.77. Their spread changes from +$0.07 to −$0.20. Price closes at $109.80, 16.82% below the earlier $132 high. These values give you the crossing, current price position and prior-high distance in one view.
The next close is $109.80. It replaces $124.80 in the 50-day window, reducing that mean by $15 / 50 = $0.30 to $117.57.
For the 200-day mean to move from $117.80 to $117.77, the outgoing observation is $115.80. The update is ($109.80 − $115.80) / 200 = −$0.03.
The new spread is −$0.20. Price is 16.82% below the earlier $132 high. The table shows the exact change in the two averages.
How to read slope and price position around a death cross
The crossover compares two levels. Each line’s slope describes its own direction of change. Current price position shows where the market stands relative to both averages.
Combine those readings with the nearest swing levels and the setup’s trigger. A negative average spread is one defined chart condition; the complete rule specifies how it changes the trade.
Each SMA update includes both the price entering its window and the price leaving. An old low rolling out can lift an average, while an old high rolling out can lower it. The event therefore follows the full window history.
How traders use a death cross
Choose whether the death cross starts a bearish setup, changes an existing exposure or triggers an entry. Set the decision bar, entry, invalidation, size and exit.
Match the average type, periods, input, interval, sessions and adjustments. EMA uses a different weight profile from SMA, so the two configurations can have different crossover dates.
For a rule that acts on completed daily bars, evaluate the relationship at the completed close and define when the order is entered. Evaluate the resulting fills and costs as part of the same strategy.
After the cross, Options Flow shows whether put buyers are paying the ask in the name, and the Options Profit Calculator maps each bearish structure’s payoff from the completed close down to your target.
Limitations of the death cross
- Measure how far price has already fallen before acting. Both averages are built from past closes, so the cross arrives after the decline. In the example, price is 16.82% below its high on the signal day.
- Add a slope or price filter in sideways markets. A cross is a single bar: the averages can cross back, and in a sideways market the two lines can cross repeatedly.
- Match the periods, average type, price input, sessions and adjustments before comparing charts. Each one can change the crossing date, so two charts can mark the event on different days.
- Check the price leaving each window. The averages move on prices leaving the window as well as prices entering it, and an old high rolling out can lower an average without any new weakness.
- Build the trade around the cross, with the entry, invalidation, size and exit set as separate rules.
Bottom line
A death cross marks the bar where a shorter moving average falls below a longer one, most often the 50-day below the 200-day, showing that recent prices have averaged below the longer history. Read it with each line’s slope, price position and nearby levels, and decide in advance whether it starts a setup, changes exposure or triggers an entry.
Clear answers
Frequently Asked Questions
Sources and Further Reading
- Fidelity: Moving Averages and the Golden Cross
- Fidelity Technical Indicator Guide: Simple Moving Average
How entries are sourced, calculated and updated: editorial methodology.