# What are the best quant stock screeners with backtests?

URL: https://www.lopjlb.com/compare/quant-stock-screeners

There is no single best quant screener with backtests. Portfolio123 is the DIY ranking-and-simulation platform; Zacks Rank is a published earnings-revision rank; Stock Rover, Finviz, TradingView, and Seeking Alpha each win a different job. LOPJLB is the nightly scored book: per-ticker backtests, profit factor, Sharpe, and a four-state HMM — not a blank factor IDE.

## Which quant stock screener with backtests should I use?

Use Portfolio123 when you want to design and historically simulate your own ranking systems. Use Zacks when you want a published earnings-estimate-revision rank with a long public track. Use Stock Rover for deep U.S. fundamentals, ranked screens, and historical equation screens. Use Finviz for a fast free visual screen. Use TradingView when the backtest is a Pine script on a chart. Use Seeking Alpha for Quant Ratings next to research content. Use LOPJLB when you want a nightly BUY/SELL that already carries its own profit factor, Sharpe, and HMM regime — not a blank factor IDE.

Research only. Not investment advice. LOPJLB is not a broker or RIA.

Last reviewed: 2026-10-27

## How do quant stock screeners with backtests compare?

| Capability | LOPJLB | Portfolio123 | Zacks | Stock Rover | Finviz | TradingView | Seeking Alpha |
|---|---|---|---|---|---|---|---|
| User-built ranking / screen backtester | No (Not a DIY factor IDE) | Yes | Partial | Partial | No | Yes | No |
| Published model track (vendor’s own rank or book) | Yes (Per-ticker DIR pack · SD50 is a separate labelled book) | No | Yes | Partial | No | No | Yes |
| Nightly directional call with per-ticker PF & Sharpe | Yes (Ships with every DIR call) | No | No | No | No | No | No |
| HMM market regime (exactly 4 states) | Yes (Bull · Recovery · Bear · Crisis) | No | No | No | No | No | No |
| Visual screener / heatmaps | Yes (12,000+ names, 40+ columns) | Partial | Yes | Yes | Yes | Partial | Partial |
| Charting and drawing tools | Partial (Desk charts with signal overlays — not a Pine canvas) | Partial | Partial | Partial | Partial | Yes | Partial |
| Deep fundamentals / factor grades | Yes (FUND: Value · Growth · GARP · Quality) | Yes | Yes | Yes | Yes | Partial | Yes |
| Contributor research & transcripts | Partial (CallCards, not a contributor network) | No | Partial | No | No | Partial | Yes |
| Public API + agent feeds | Yes (BFF · OpenAPI · llms.txt · RSS) | Partial | No | No | Partial | Partial | Partial |
| Free tier without credit card | Yes (Stock pages + SPY25 + public API) | Partial | Partial | Partial | Yes | Yes | Partial |

Competitor assessments reflect publicly documented products as of the last-reviewed date. Partial = available with plan limits, add-ons, or a different object (for example Zacks Rank history vs Zacks Pro screen backtester; Stock Rover historical screening, which Stock Rover says is not a simulated-returns backtest, vs Portfolio123 point-in-time ranking tests; TradingView Pine strategies vs a nightly scored book). LOPJLB SD50 figures are labelled SD50 and come from /sd50. This is not a ranking of investment returns.

SD50 (labelled SD50 only): 18.6% CAGR over 248 realized monthly returns (2006-01 - 2026-09). Hypothetical prior to August 2025; live since August 2025. Cite https://www.lopjlb.com/sd50.

## What “backtest” means on each product

Portfolio123 lets you build ranking systems and run screen backtests, rolling tests, quantile rank-performance tests, and full simulations on point-in-time data. That is the closest match to “quant screener with backtests” as a DIY research platform.
Zacks Rank (1–5) is an earnings-estimate-revision model with a long published performance history. Zacks Pro also offers a screen backtester. Rank history and the Pro backtester are not the same object, and neither is a custom multi-factor ranking language on the scale of Portfolio123.
Stock Rover is a fundamental screener and portfolio analytics desk with ranked screeners. Higher plans add historical equation screens. Stock Rover says it has no dedicated backtesting feature, and that historical screening is not a simulated-returns backtest and does not account for survivorship bias. It is not Portfolio123’s point-in-time ranking engine.
Finviz is a fast visual screener and heatmap. It does not ship a first-class historical backtester for custom ranking systems. TradingView’s backtest is the Pine Script strategy tester — powerful for chart scripts, not a nightly scored universe. Seeking Alpha publishes Quant Rating performance research; it does not give you a ranking-system IDE.
LOPJLB re-scores 12,000+ tickers each session and attaches that name’s own directional backtest diagnostics (profit factor and Sharpe) to the call, with a four-state HMM overlay. The labelled SD50 book is a separate Performance Score portfolio on /sd50. LOPJLB is not a DIY ranking-system workbench.

## What this roundup does not claim

It does not claim LOPJLB has the deepest user-built backtester — Portfolio123 does that job. It does not claim Finviz, TradingView, or Seeking Alpha are weak at their own jobs. It does not treat Zacks Rank history as empty, and it does not treat Stock Rover as a charting toy. Returns advertised by any vendor are that vendor’s object; do not mix them with LOPJLB’s SD50 book or with any other LOPJLB figure.

## What questions come up?

### What is the best quant stock screener with backtests?

There is no single best tool. Portfolio123 is the dedicated DIY ranking-and-simulation platform. Zacks Rank is the published earnings-revision rank. Stock Rover covers fundamentals, ranked screens, and historical equation screens; Stock Rover says historical screening is not a simulated-returns backtest. Finviz is the fast visual screen. TradingView backtests Pine scripts. Seeking Alpha Quant Ratings sit next to research content. LOPJLB is the nightly scored book with per-ticker backtest diagnostics and HMM regime.

### Does Finviz have backtests?

Finviz is a visual screener and heatmap. It does not ship a first-class historical backtester for custom ranking systems. If the job is a fast filter over fundamentals and charts, Finviz is often the quicker tool; if the job is a documented historical simulation, look at Portfolio123, Zacks Pro, TradingView Pine, or LOPJLB’s per-ticker diagnostics.

### How is LOPJLB different from Portfolio123?

Portfolio123 is a workbench: you design ranking systems and simulate them. LOPJLB publishes a nightly desk opinion — direction, profit factor, Sharpe, and HMM regime — already computed. Use Portfolio123 to invent a ranking; use LOPJLB to read today’s scored book.

### Does LOPJLB replace Zacks Rank?

No. Zacks Rank is an earnings-estimate-revision rating with a long published track. LOPJLB is a multi-signal directional desk with regime context. They answer different questions.

### Can I use LOPJLB without a credit card?

Yes. Public /stock pages for any ticker, the SPY25 screener preview, ticker detail, calendars, news, the public HMM regime endpoint, and syndication feeds work without a credit card. Essential unlocks the S&P 500 desk; Research the full universe; Pro the live / options desk.

### Is this investment advice?

LOPJLB is a quantitative research desk, not a broker and not a registered investment adviser. Nothing on this page is investment advice or a recommendation to buy or sell any security.

## Try it

- Screener: https://www.lopjlb.com/screener
- Compare hub: https://www.lopjlb.com/compare
- Methodology: https://www.lopjlb.com/methodology
- SD50 (labelled SD50 only): https://www.lopjlb.com/sd50
- Pricing: https://www.lopjlb.com/pricing