Polygon.io Market Data

Trend Classification Engine

Scan US stocks by price, market cap, and timeframe. The engine applies technical rules to classify available data as Uptrend, Downtrend, or Ranging; labels are observations, not recommendations or probabilities.

Daily sample: 5 rows from a stored scan

A fixed basket of 25 large U.S. stocks is classified once a day after the market closes, with the same rules the full scanner uses. This page only shows the stored result; visiting it never starts a scan.

Sample unavailable. The live sample is switched off while we confirm our market-data provider's permission to show it publicly. No sample is being shown.

What paid plans add

The daily sample applies the same classifier to a fixed basket, on one timeframe, and shows five rows. The table lists what the Pro and Research Pro plans include for the full scanner.

The free daily sample compared with the full scanner on the Pro and Research Pro plans.
Feature	Free daily sample (not shown right now)	Pro and Research Pro
Coverage	A fixed basket of 25 large stocks	Up to 1,000 supported U.S. stocks per scan
Timeframes	Daily only	5 timeframes: 1H, 4H, Daily, Weekly, Monthly
Rows	5 rows	All matching rows
Filters	None	Sector and market-cap filters, price range
Export and your last scan	None	CSV export; your last completed scan stays in your account

Access Trend Classification Scans

Review rule-based Uptrend, Downtrend, or Ranging classifications filtered by sector, market cap, and timeframe. Classifications may change as data updates.

See Plans & Pricing Sign In

Starting at $9.99/month · Cancel anytime

Illustrative example: how to read a row

Fictional values · not current market data

Sample data — prices shown are illustrative and do not reflect current market values

Illustrative sample stock scanner rows, not current market data. Definitions follow the table.
Ticker	Trend	Rule Fit	Price	Sector	Mkt Cap	ADX	Signals
NVDA	▲ Uptrend	94%	$487.21	Technology	$1.19T	34.2	EMA aligned · ADX strong · HH+HL structure
MSFT	▲ Uptrend	89%	$378.45	Technology	$2.81T	28.7	EMA aligned · ADX strong · price above EMA50
ABBV	▲ Uptrend	83%	$162.78	Healthcare	$283B	26.1	EMA aligned · ADX moderate · HH+HL structure
JPM	▲ Uptrend	76%	$196.32	Finance	$561B	22.8	EMA aligned · ADX moderate · +DI > −DI
AMZN	▲ Uptrend	79%	$182.45	Consumer	$1.91T	24.5	EMA aligned · ADX moderate · bullish slope
TSLA	◆ Ranging	45%	$178.90	Consumer	$569B	16.3	EMA spread tight · ADX weak · oscillating price
XOM	◆ Ranging	38%	$104.56	Energy	$416B	14.1	EMA cross · ADX weak · neutral structure
BA	▼ Downtrend	74%	$162.12	Defense	$99B	29.4	EMA inverted · ADX strong · LH+LL structure

Sample fields and how to read them

The rows in the example table above are illustrative examples only. Their prices, market capitalizations, indicators, and signals are fictional and are not current market data. The live daily sample, when it is shown, is the separate table at the top of this page.

Ticker / Trend: Example stock symbol and rule-based Uptrend, Downtrend, or Ranging classification.
Rule Fit: 0–100 measure of how closely the available observations fit the displayed classification; it is not a probability or forecast.
Price / Mkt Cap / Sector: Illustrative price and company-size values, plus the example industry grouping.
ADX: Average Directional Index, a measure of trend strength; it does not indicate direction by itself.
Signals: Short labels for the example rule observations, such as moving-average alignment, ADX strength, or price structure.

Illustrative worked example: NVDA sample row

The linked example row displays ▲ Uptrend, 94% Rule Fit, $487.21 price, 34.2 ADX, and “EMA aligned · ADX strong · HH+HL structure.” Read this as an illustrative row where the classification, rule-fit measure, ADX reading, and listed signals appear together—not as a current NVDA quote or a prediction. Rule Fit is not the chance the trend will continue.