Portfolio Guardian vs Finviz: which one do you use first?
If you're comparing Portfolio Guardian to Finviz, you're asking the wrong question. They don't do the same thing.
Finviz is one of the best free stock screeners available. It has been for years. Nearly 20 million people use it monthly. The screener covers stocks on the NYSE, NASDAQ, and AMEX with 60+ filters spanning fundamentals, technicals, and trading metrics. The heat map alone is worth bookmarking. It gives you a real-time visual snapshot of market sentiment across every sector.
Portfolio Guardian is not a screener. It doesn't give you 60 filters and let you build custom screens. It does something different: it runs a built-in methodology across 6,000+ companies and tells you when a setup has validated. No filters to configure. No screens to build. You open the app and it shows you where the signal is.
These are different tools solving different problems. The real question isn't "which is better?" It's "which one comes first?"
What Finviz does well
Finviz is exceptional at letting you slice the market by almost any metric you can think of. Want stocks with a P/E under 15, market cap above $1 billion, and positive EPS growth? Done in seconds. Want to filter by sector, country, and technical pattern simultaneously? No problem.
The heat map gives you a birds-eye view of what's moving. The visualisation tools let you spot sector rotations and market-wide trends at a glance. The news aggregation pulls from major financial sources and attaches headlines to individual tickers. And the free tier is genuinely generous. You can run screens, browse heat maps, and track portfolios without paying anything.
For anyone who already has a methodology and knows exactly what metrics matter for their strategy, Finviz is a powerhouse. You set your filters, run the screen, and get a list of candidates that match your criteria.
What Finviz assumes you already know
This is where the gap lives. Finviz gives you the tools. It doesn't tell you what tools to use.
If you don't know what P/E ratio constitutes "good" for a specific sector, the P/E filter doesn't help you. If you don't know whether to prioritise revenue growth or earnings growth for the type of company you're looking at, the growth filters just add noise. If you can't distinguish between a stock that's cheap because it's undervalued and a stock that's cheap because it's deteriorating, the valuation filters won't save you.
Finviz is a power tool. It makes experienced investors faster. But it doesn't make inexperienced investors better. It just gives them more knobs to turn.
This isn't a criticism. It's the nature of screeners. They're designed for people who already have a framework and need a way to apply it efficiently. That's a legitimate and important job.
But it leaves a gap for everyone else. For the person who opened a brokerage app last month and doesn't yet have a framework. For the ETF investor who wants to pick a few individual stocks but doesn't know where to start. For anyone who feels like they're copying someone else's screen rather than running their own process.
What Portfolio Guardian does differently
Portfolio Guardian fills the gap that comes before the screener.
Instead of asking you to set filters, it applies a methodology. That methodology looks at fundamental inflection (is revenue re-accelerating? are margins expanding? is cash flow improving?) combined with valuation compression (is the price-to-sales ratio compressed relative to this company's own historical range?).
When both conditions are present, the stock enters a signal state: setup has been detected (Matched). When conditions are developing but not yet confirmed, it shows as worth watching (Stalking). When there's nothing interesting happening, it says so (Ignore). And when a previous setup has run its course, the signal updates (Window Closed).
You don't decide what the filters are. The methodology is built in. What you decide is what to do with the output.
This is a fundamentally different starting point. Finviz says "tell me what you want and I'll find it." PG says "here's what the data shows, you decide if it matters to you."
The workflow: PG first, Finviz second
The strongest use of both tools is in sequence.
PG screens the full universe. Browse the Discover page. See which companies have entered a Matched state. You'll find names you weren't looking for — companies you might never have screened for because you didn't know they existed or didn't know the setup was there.
Then move to Finviz. Now you have a specific company to investigate. Use Finviz's financial data to check the balance sheet. Look at the chart for price patterns and technical levels. Compare the company to its sector peers using Finviz's comparison tools. Read the latest news. This is where Finviz's depth shines, when you already know what you're looking at.
PG narrows 6,000 companies to a handful with detected setups. Finviz helps you evaluate those setups in detail. Different tools, different stages, same workflow.
You wouldn't use a microscope to figure out which slide to examine. You'd use a different tool for that. Then you'd use the microscope for the close-up work. Same principle.
Who should use which
If you already have a well-developed investment framework and you know exactly what metrics to filter for, Finviz alone may be all you need. You've got the methodology in your head. You just need the filtering engine to apply it.
If you're earlier in your investing journey, or if you find yourself copying other people's screens because you don't have your own framework yet, Portfolio Guardian gives you a starting point that doesn't require you to know what to filter for. The methodology is built in. The signal states do the initial filtering. Your job is to decide whether the output is worth your deeper attention.
And if you're the kind of investor who already uses Finviz but finds yourself spending too much time screening without conviction, PG might change the order of operations. Start with signal, then screen. You might find that having a shortlist of validated setups before you open Finviz makes the screener dramatically more useful.
The honest take
Finviz is an excellent product. It's been a staple of retail investing for over a decade for good reason. Nothing in this article suggests replacing it.
Portfolio Guardian is the step before. The thing that answers "where should I even start?" so that when you do open Finviz, you're investigating something specific rather than exploring the entire market with no direction.
They work well together.
See which stocks have a detected setup. Download Portfolio Guardian, free on iOS and Android.
Frequently Asked Questions
Is Portfolio Guardian a stock screener?
No. It does not give you a bank of filters to configure. It applies a built-in methodology and shows you where the signal is.
Can Finviz be enough on its own?
Yes, if you already have a well-developed framework and know exactly what metrics to filter for. In that case you may only need the screening engine to apply the process you already have.
Should I use Portfolio Guardian and Finviz together?
Yes. Portfolio Guardian works best as the first-pass discovery layer, and Finviz becomes more useful once you already have a specific company to investigate.
Portfolio Guardian is a research and analysis tool operated by Scydex Ltd. Scydex Ltd is not authorised or regulated by the Financial Conduct Authority. Portfolio Guardian does not provide investment advice, recommendations, or solicitations to buy or sell securities. All data is for informational purposes only. Past performance of any signal, cohort, or classification does not guarantee future results. All investing involves risk, including loss of principal. Always conduct your own research and consult a qualified financial adviser before making investment decisions.
Portfolio Guardian is available as a free download on iOS and Android.
