What is the optimal trading platform for predominantly frequent swing trading and long-term investments in US stocks, with occasional day trading?

When searching for a trading platform that caters to frequent swing trading, long-term investments, and some day trading in US stocks, you need to consider various factors like fees, tools, research capabilities, and user experience. Here are some top platforms that can fit these needs:
TD Ameritrade: Renowned for its comprehensive trading tools and resources, TD Ameritrade offers the thinkorswim platform, which is excellent for swing trading due to its advanced charting capabilities and a wide range of indicators. It also supports long-term investing with no commission fees on online US-listed stock trades and offers robust research and educational materials.
Charles Schwab: This platform provides a great balance between long-term investing and frequent trading. Their StreetSmart Edge platform is user-friendly and efficient for swing and day trading. Like TD Ameritrade, Charles Schwab offers commission-free trades on US-listed stocks and has plenty of resources for research and analysis.
Interactive Brokers: Known for its advanced trading capabilities and low margin rates, Interactive Brokers is a favorite among serious traders. It supports a variety of trading styles with powerful tools and has a tiered commission structure that can be beneficial for active traders.
Fidelity: With a strong emphasis on customer service and a range of investment options, Fidelity is ideal for long-term investors while also offering competent trading tools for swing trading. Their brokerage services come with zero commissions on stock trades and a broad spectrum of research tools.
ETRADE: ETRADE stands out for its versatile Power E*TRADE platform, which is well-suited for both swing trading and occasional day trading. It offers advanced trading tools and a library of charts and analytical tools along with commission-free trading for US stocks.

Ultimately, the best platform depends on your specific needs, such as the level of trading support you require, the value you place on customer service, and any additional features you might need. It’s worth exploring each platform to see which interface and tools align best with your trading and investing goals.