Trend Strength Alerts

ADX Alerts — Average Directional Index Notifications

Get alerted when ADX crosses your threshold on any stock or ETF. Know when a trend is strong enough to trade — or weakening enough to exit. Alert when ADX rises above 25 (strong trend) or falls below 20 (weak trend or chop).

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Latest Available Data

90-Day Alert Overview

US Fear & Greed Index vs. S&P 500

Fear & Greed Index
S&P 500
Example threshold (40)
Alert markers (below 40)
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What is ADX?

The Average Directional Index explained

The Average Directional Index (ADX) was developed by J. Welles Wilder Jr. in 1978 — the same developer behind RSI. While RSI measures the speed of price changes, ADX measures the strength of a trend. Critically, ADX does not indicate the direction of the trend — only how strong it is.

ADX runs on a scale from 0 to 100. A rising ADX means the trend (whether up or down) is strengthening. A falling ADX means the market is losing directional conviction. Most traders use ADX to filter out choppy, low-conviction markets and only trade when ADX confirms a real trend is in place.

0 – 20
Weak / No Trend
Choppy market — avoid trend-following strategies, range trading preferred
20 – 25
Trend Forming
A trend may be beginning to develop — watch for confirmation
25 – 40
Strong Trend
A definite trend is in place — trend-following strategies are most effective here
40 – 100
Very Strong Trend
Extremely strong directional move — potential for continuation or exhaustion

How it works

Set an ADX alert in minutes

1

Choose a ticker

Search any stock or ETF by name or symbol — SPY, AAPL, NVDA, QQQ, or any US-listed equity.

2

Set the ADX period

Enter the period — 14 is the standard. ADX with 14 periods looks back at the last 14 bars of price action.

3

Set your threshold

Alert when ADX crosses above 25 (strong trend confirmed) or below 20 (trend weakening). Any value is supported.

4

Optionally combine

Combine ADX with MACD or RSI to add trend direction on top of trend strength — the most powerful combination.

5

Receive your alert

When ADX crosses your threshold, you'll receive a rich alert with the current value and full market context after the next scheduled evaluation.

Example alerts

Popular ADX alert configurations

ADXSPY strong trend alert
ADX (SPY, 14) above 25
Alert when the S&P 500 ETF enters a strong directional trend — useful for switching from range-trading to trend-following strategies.
ADXTrend weakening exit signal
ADX (SPY, 14) below 20
Alert when the ADX falls below 20 — the market is losing directional conviction and trend-following positions should be reviewed.
ADXConfirmed bullish momentum
ADX (QQQ, 14) above 25
Double-confirm an uptrend: ADX confirms trend strength while MACD confirms bullish direction — a high-quality trend entry signal.
Combined with: MACD (QQQ) above 0
ADXFear in a strong downtrend
ADX (SPY, 14) above 30
Alert when ADX shows a strong trend while market sentiment is in fear — may indicate a decisive downtrend move rather than a buy-the-dip opportunity.
Combined with: Fear & Greed Index below 30
ADXNVDA trend confirmation
ADX (NVDA, 14) above 30
Alert when Nvidia enters a very strong trend — useful for high-volatility stocks where knowing trend strength matters most.
ADXFull trend filter combo
ADX (SPY, 14) above 25
The classic trend-filter compound: ADX confirms a strong trend exists, MACD confirms the direction is bullish, RSI confirms not overbought.
Combined with: MACD (SPY) crosses above signal AND RSI (SPY, 14) below 60

FAQ

ADX alerts — common questions

What does ADX measure? +
What ADX threshold should I alert on? +
Can I combine ADX with RSI or MACD? +
Does ADX tell me the trend direction? +
How often is ADX evaluated? +
Which stocks and ETFs are supported? +

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Also explore: RSI Alerts  ·  MACD Alerts  ·  All Stock Alerts