# Master Stock Screeners: Definition, Functionality, & Practical Example

## What Is a Stock Screener?

A stock screener is an investment tool that helps investors filter and find stocks based on specific criteria. Investors can use a stock screener to make decisions that fit their personal strategies. Screeners often come with features like alerts and the ability to narrow down choices. They come in free and paid versions and often include technical and fundamental analysis tools, making it easier to identify investment opportunities.

### Key Takeaways

*   Stock screeners help investors filter and analyze stocks based on their specific criteria, aiding in identifying suitable investment opportunities among thousands of securities.  
    
*   Integrating technical analysis with stock screeners enhances the precision of stock selection, using indicators like moving averages, RSI, and MACD to evaluate price movements and trends.  
    
*   Users can optimize their stock screening process by incorporating Boolean logic and key financial ratios, such as P/E ratio and dividend yield, to tailor stock searches to their investment strategies.  
    
*   Popular stock screeners like Finviz, Yahoo Finance, and StockFetcher offer a range of features, with each platform catering to different investor preferences, from user-friendly interfaces to advanced custom filters.  
    
*   Mobile apps for stock screeners and API integration allow for flexible, on-the-go access and automation of screening tasks, providing real-time updates and streamlined investment decisions.

## Understanding the Functionality of Stock Screeners

Stock screeners allow investors to weed through the extensive field of potential financial investments using their own criteria. Users begin the process by selecting certain investing parameters, based on their personal requirements. For example, a fundamental investor may be most interested in market capitalization, analyst recommendations, [earning per share](https://www.investopedia.com/terms/e/eps.asp) (EPS), operating cash flow, multi-year [return on investment](https://www.investopedia.com/terms/r/returnoninvestment.asp) (ROI), dividend yield, and the like.

Adding more criteria reduces the number of potential securities to invest in. The bottom line is that stock screeners typically have something for every investor and should be used to see what type of information is available before entering a trade or investment.

![Finviz, Home Page](https://www.investopedia.com/thmb/KEK09ODUyH3MM-SvMrJkOHP9fMs=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/Screenshot2023-12-26215204-65f717c5cf68430aa71de5c54f0d3486.png)

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## Integrating Technical Analysis with Stock Screeners

Within some stock screeners, you can integrate technical analysis tools to elevate the precision of your stock selection methodologies. This makes the stock screener feel more like a technical analysis tool rather than a filter to find potential securities.

These tools provide quantitative measures that help investors understand price movements and market dynamics. Stock screeners can include various technical indicators, such as:

*   **Moving Averages:** Moving averages, like the simple (SMA) or exponential (EMA), are key for analyzing trends. Stock screeners employ moving averages to identify trends by smoothing out price data over a specific period once you click into the selected security you're interested in.
*   **Relative Strength Index (RSI):** RSI, a momentum oscillator, gauges the speed and change of price movements. It is a valuable tool to assess whether a stock is overbought or oversold. Again, some screeners may display the RSI over time once a particular securityis selected.
*   **Moving Average Convergence Divergence (MACD):**  
    MACD, a trend-following momentum indicator, has two lines: the MACD line and the signal line. Stock screeners leverage MACD to identify changes in momentum and potential trend reversals.
*   **Bollinger Bands:** [Bollinger bands](https://www.investopedia.com/trading/using-bollinger-bands-to-gauge-trends/) consist of a simple moving average line and two outer bands representing standard deviations. Within stock screeners, Bollinger Bands are utilized to identify volatility and potential price breakouts. Stock prices approaching or touching the outer bands may indicate heightened volatility.

> **Fast Fact**
>
> Different stock screening websites may look dramatically different. They may use different filtering techniques, and they may display the results in different graphics or lists.

## Effective Strategies for Using Stock Screeners

If you're not entirely sure how to get started, consider some of the following advice when setting up your filters or queries.

*   Use Boolean logic (AND, OR, NOT) effectively in your screening criteria. This allows you to be more precise and tailor your filters, narrowing down your stock selection with greater accuracy.
*   Identify and prioritize key financial ratios based on your investment strategy. Focus on the ratios most relevant to your goals, like price-to-earnings (P/E), debt-to-equity, or current ratios.
*   Include volume as a screening parameter. Stocks with higher [trading volumes](https://www.investopedia.com/ask/answers/041015/why-trading-volume-important-investors.asp) generally offer better liquidity, ensuring smoother order execution.
*   If income generation is a priority, incorporate dividend yield as a screening criterion. This helps identify stocks that offer attractive dividend payouts relative to their stock price. Note that a company that has historically paid out dividends may choose to no longer do so at any point.
*   Adjust your screening to include specific market capitalization ranges. This allows you to focus on stocks that align with your preferences, whether it's taking on more risk with small-cap or playing it a little safer with large-cap securities.
*   If possible, include analyst ratings and recommendations in your screening process. This external perspective can provide additional insights into a stock's potential performance. It can also provide an opportunity to better understand what the industry is thinking should you choose to intentionally invest in opposing ideas.
*   If [environmental, social, and governance (ESG)](https://www.investopedia.com/terms/e/environmental-social-and-governance-esg-criteria.asp) factors are important to you, leverage screeners that allow filtering based on sustainability and ethical considerations. Note that stock screeners may dictate this term on inconsistent or varying definitions.

## Practical Example of Using a Stock Screener

When you first encounter a stock screener, you’re likely to be overwhelmed. There will be dozens of categories to view, both on the technical side and the fundamental side. So before you dive in, decide which side of the valley you’re on—technical or fundamental. Consider what you're looking for, what your priorities are, and what types of financial instruments might be of interest. Then you can begin to explore what the screener has to offer.

If your focus is on the short-term, you are likely to be drawn to the multiple technical tools available: charting; alerts; momentum studies, RSI, and more technical studies. If you’re focused on a particular stock or ETF, you can set alerts for when that particular stock crosses a set price level, or for when its RSI hits overbought/sold, for example.

If you’re a longer-term investor, you’ll find plenty of fundamental data (sometimes referred to as technical data), such as EPS, average daily volume, market capitalization, and the like. Such data can help you construct a portfolio keeping in mind that you have a longer-term interest in the company, beyond just the latest headlines. 

## Top Stock Screeners for Investors

There's many stock screeners to choose from. Below are three of the more widely used stock screeners that have become go-to tools for both novice and seasoned investors.

### Finviz

Finviz stands out for its user-friendly interface and comprehensive set of features. Investors can quickly screen stocks based on various criteria, visualize data through charts, and stay updated with real-time market information. Finviz's heat maps and performance charts add an extra layer of depth to the screening process.

### Yahoo Finance

Yahoo Finance is a household name in financial news, but it also offers a robust stock screening tool. Integrated seamlessly with its extensive financial news and analysis platform, Yahoo Finance's screener allows users to filter stocks based on a wide range of fundamental and technical parameters. It also includes analyst recommendations and financial statements.

### StockFetcher

StockFetcher caters to traders and investors who appreciate the flexibility of creating custom filters. With a powerful scripting language, StockFetcher enables users to define intricate conditions for screening that may be a little more technical than the options above. It's a great choice for those who want to fine-tune their strategies and identify stocks that align with specific technical patterns or criteria.

## Are There Mobile Apps for Accessing Stock Screeners on the Go?

Many stock screeners offer mobile apps, allowing users to access screening tools on the go.

## What Are the Pros and Cons of Free vs. Premium Stock Screeners?

Free stock screeners often offer basic functionalities, making them suitable for casual investors. Premium stock screeners, on the other hand, provide advanced features, additional screening criteria, and enhanced data analysis capabilities. Many free versions offer a profile where you can save screening criteria, though the full functionality here may be limited.

## How Do I Use API Integration for Automated Stock Screening?

API integration in stock screeners allows users to connect with external data sources and automate certain tasks. By leveraging APIs, investors can set predefined rules, receive real-time updates, and automate actions such as trade executions or alert notifications.

## Can Stock Screeners Be Used for International Market Analysis?

Yes, stock screeners can be used for international market analysis. Many platforms offer the capability to filter stocks based on global exchanges.

## The Bottom Line

Investors can use stock screeners to analyze different stocks, making it easier to find opportunities that match their strategies. They are available for free on many platforms or through paid subscriptions. You can find different features like alerts, technical indicators, and custom searches. To use them effectively, it's important to have some basic knowledge about technical analysis and real-time alerts.

> **Article Sources**
>
> 1.  Finviz. "[Home](https://finviz.com/)."
>     
> 2.  Yahoo Finance. "[Screener](https://finance.yahoo.com/screener)."
>     
> 3.  StockScreener. "[Home](https://stockfetcher.com/)."