In the dynamic world of stock trading, gaining a competitive edge is crucial. This is where a premarket scanner like TOS (ThinkOrSwim) comes into play, offering traders a powerful tool to analyze market trends before the market even opens. But what exactly is a premarket scanner, and how can TOS help you make informed trading decisions?

Premarket scanners are software tools that allow traders to monitor and analyze stock market activity before the official market open. They provide real-time data, enabling traders to identify potential opportunities and make strategic decisions. TOS, developed by TD Ameritrade, is one of the most popular premarket scanners due to its robust features and user-friendly interface.

Understanding ThinkOrSwim (TOS)
ThinkOrSwim is a comprehensive trading platform that offers a wide range of tools for active traders. Its premarket scanner is a standout feature, designed to help traders navigate the pre-market session effectively. Here's a closer look at TOS and its premarket scanner.

TOS is known for its advanced charting capabilities, extensive backtesting features, and a vast array of customizable indicators. It's these features that make TOS an excellent choice for both beginner and experienced traders. The platform's premarket scanner, in particular, is designed to help traders identify potential stocks that could make significant moves during the trading day.
Key Features of TOS Premarket Scanner

TOS's premarket scanner comes with a suite of features that make it a powerful tool for pre-market analysis. Here are some of its key features:
- Real-time Data: TOS provides real-time data, ensuring that traders have the most up-to-date information to make informed decisions.
- Customizable Scan Criteria: TOS allows traders to customize their scan criteria, enabling them to filter stocks based on specific parameters like price, volume, and percentage change.
- Advanced Charting Tools: TOS's advanced charting tools allow traders to analyze stocks in-depth, providing a comprehensive view of the stock's performance.
How to Use TOS Premarket Scanner

Using TOS's premarket scanner is straightforward. Here's a step-by-step guide:
- Open the TOS platform and navigate to the 'Scan' tab.
- Select 'Pre-Market' from the list of available scans.
- Customize your scan criteria based on your trading strategy.
- Review the results and analyze the stocks that meet your criteria.
- Use TOS's advanced charting tools to analyze the stocks further.
Strategies for Using TOS Premarket Scanner

While TOS's premarket scanner is a powerful tool, it's essential to use it effectively. Here are some strategies to help you get the most out of TOS's premarket scanner:
Identifying Gappers



















One of the primary uses of a premarket scanner is to identify 'gappers' - stocks that have opened with a significant gap up or down from their previous close. These stocks often have high volatility and can present exciting trading opportunities.
TOS's premarket scanner allows you to filter stocks based on their gap percentage, making it easy to identify potential gappers. However, it's crucial to remember that not all gappers will continue their trend throughout the day. Therefore, it's essential to use additional tools like TOS's advanced charting features to analyze the stock's performance further.
Monitoring High Volume Stocks
High volume stocks can also present exciting trading opportunities. High volume often indicates increased interest in a stock, which can lead to significant price movements. TOS's premarket scanner allows you to filter stocks based on their volume, making it easy to identify high volume stocks.
However, it's essential to note that high volume alone is not a reliable indicator of a stock's performance. Therefore, it's crucial to use additional tools like TOS's advanced charting features to analyze the stock's performance further.
In the fast-paced world of stock trading, having the right tools can make all the difference. TOS's premarket scanner is a powerful tool that can help traders make informed decisions, identify potential opportunities, and stay ahead of the competition. So, why not give it a try and see how it can enhance your trading strategy?