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Methodology Documentation

How the Free US Stock Screener Works

Every number on this site comes from a documented, repeatable system. This page covers the full stack — from raw data ingestion to final valuation output.

6 Systems Documented·31,500+ Words·Updated February 2026
Systems Overview
Infrastructure · Data

Data & Market Infrastructure

Financial statements are sourced directly from SEC EDGAR 10-K and 10-Q filings, parsed from structured XBRL/iXBRL data. Market prices, volume, and enterprise value are computed from institutional-grade exchange feeds with end-of-day processing. The pipeline normalizes 180+ financial line items to a standardized schema, resolves cross-year comparability, and runs automated anomaly detection at ingestion.

5,800+ US equities7+ years fundamentals20+ years price historyDaily refresh
Open Screener
Engine · Screener

Screener & Metrics Engine

200+ metrics are pre-computed across every covered equity each trading day — accounting ratios (P/E, EV/EBITDA, P/FCF), derived quality scores (Piotroski F-Score, Magic Formula rank), and proprietary pattern grades. Price consolidation patterns are detected from price and volume series using geometric validation: contraction depth, contraction count, volume dry-up, and pivot proximity each contribute to a quality grade (A+ to D). No subjective interpretation.

200+ screener metrics36 prebuilt screensPattern grades: A+ to DPiotroski F-Score (0–9)
Open Screener
Engine · Technicals

Technical Analysis Engine

Technical indicators are computed natively from the price history database on each request. This includes simple and exponential moving averages (10/21/50/150/200-day), RSI-14, ATR-14, 52-week Beta, and the proprietary RS Rating — a percentile rank of 12-month price performance weighted toward the most recent quarter. Five programmatic verdicts (Trend, RSI, Breakout Setup, Volume, Relative Strength) are derived from deterministic decision trees with no ambiguity.

20+ technical indicatorsRS Rating: 0–99 percentileBeta vs S&P 500All 5,800+ equities
See Example
Full Model Documentation
Full Documentation · DCF

DCF Intrinsic Value Model

How we compute intrinsic fair value for 700+ eligible US equities. Covers eligibility gates, FCF normalization, CAPM-based WACC, Gordon Growth terminal value, Bear / Base / Bull scenario construction, and output sanity bounds.

~7,500 words12 sectionsModel v2.0
Read full methodology
Full Documentation · Relative

Relative Valuation Model

How we construct peer universes, weight multiples, run 10,000-path Monte Carlo simulations, apply quality adjustments, and produce a composite signal score. Sixteen analytical frameworks, cross-sectional regression, and cyclicality detection.

~16,000 words16 sectionsModel v3.2
Read full methodology
Full Documentation · Estimates

Estimates & Forecast Engine

How we generate proprietary Revenue, EPS, Operating Income, Net Income, and FCF forecasts for 3,700+ equities. Covers CAGR blending, margin mean-reversion, sell-side consensus integration, confidence scoring, and Bear / Base / Bull scenario derivation.

~8,000 words10 sectionsModel v2.0
Read full methodology

Documentation is updated whenever a model or system changes. Version numbers appear at the top of each full-doc page.

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