Moving average alerts: SMA, EMA, and what a golden cross is

A moving average smooths out daily noise so you can see the trend. Triggerly alerts when a stock's price crosses an SMA or EMA, or when that average crosses a price you set. It does not alert when two averages cross each other, so there is no 50/200 golden-cross alert. A golden cross is still useful background for the trend. Watch price versus the 200-day average instead of waiting for the averages to cross.

SMA vs EMA

• SMA (simple moving average) weights every day in the window equally. It's slower and steadier.
• EMA (exponential moving average) gives more weight to recent days, so it reacts faster and gives earlier, but noisier, signals.

Common periods

• 20-day: short-term trend, popular with swing traders.
• 50-day: medium-term trend; widely watched.
• 200-day: the long-term trend line many investors use to decide whether a stock is in an uptrend at all.

Golden cross and death cross

A golden cross is when the 50-day moving average crosses above the 200-day. A death cross is the opposite. They're slow signals: by the time they happen, a lot of the move has already happened. They're useful as trend context, not as precise entry points. Triggerly will not ping you when the 50-day crosses the 200-day. If you want a heads-up around that long-term line, set an SMA or EMA alert for price crossing the 200-day, or for the 200-day average crossing a price you care about.

Price cross vs average versus a price

Triggerly has two moving-average modes, as separate SMA and EMA alert types. Periods run from 5 to 200.

• Price cross. The live price crosses yesterday's average, above or below. This happens earlier and more often. A practical setup is price crossing the 50-day for an early heads-up, or price versus the 200-day if you care about the long-term line.
• Average versus a price. The moving-average line itself crosses a price you set. That is not one average crossing another.

Two averages crossing, including a golden or death cross, is not an alert Triggerly can send.

Set one up on Android

1. Open Triggerly and search the ticker.
2. Choose the SMA alert or the EMA alert.
3. Pick a period from 5 to 200, then price crossing the average or the average crossing a price you set, and the direction (above or below).
4. Make sure push, email, or Telegram is on in Settings → Notifications. Those channels apply to every alert, not just this one.

To reduce whipsaws, combine it with another condition, for example a volume spike, so the alert fires only when the cross comes with real participation. A MACD alert is a different kind of cross: it watches the MACD line against its signal line or the zero line on completed daily closes, not one moving average against another. A new high or new low is separate again. It fires when the live price breaks the highest or lowest close in the window you pick.

Things to keep in mind

• In sideways markets, price can cross a moving average back and forth many times. Longer periods and combined conditions help.
• A cross is information, not a trade signal by itself. Check the news and the bigger picture first.
• Alerts fire during regular US market hours and are checked every 5 minutes. The app also shows pre-market and after-hours prices, but alerts don't fire then.

FAQ

What moving-average alert does Triggerly send?

Triggerly alerts when price crosses an SMA or EMA, or when that average crosses a price you set. Periods run from 5 to 200. It does not alert when two averages cross, so a 50/200 golden cross is not an alert. Watch price versus the 200-day average instead.

Should I use SMA or EMA?

EMA reacts faster and gives earlier signals with more false alarms; SMA is slower and steadier. Many traders use EMA for short periods and SMA for the 50- and 200-day.

Is there a free app for moving average alerts?

Yes. Triggerly has SMA and EMA alerts for free on Android: price versus the average, or the average versus a price you set. Turn on push, email, or Telegram once in Settings → Notifications; those channels apply to every alert.

Triggerly guides are for education only. Not investment advice.