Question: Is there a platform that allows me to track and analyze my investment portfolio, and also compete with others to improve my skills?

If you want a service that lets you track your portfolio and compete against others to improve your skills, Stocknear is a good option. It's got a rich collection of tools, including financial information, news, charts and price predictions for more than 10,000 companies. Stocknear also has a Portfolio Tournament that lets you compete against others to see who's doing best, so it's a good way to refine your investment strategy and learn from others.

Another interesting service is StockInsights, which combines Large Language Models (LLMs) with financial data to try to make investment research easier. It offers real-time data and information that's designed to be useful for making decisions, so it's good for individuals and pros. StockInsights also has a leaderboard so you can track your performance against others, which can be a good way to improve your skills through competition.

AInvest is another AI-powered service that offers real-time analysis of market trends, stock screeners and other information to help you make decisions. With a stock screener, real-time news and a Magic Portfolio that uses machine learning to select stocks, it's a pretty full featured service to try to improve your investment skills. AInvest also includes tutorials and a daily newsletter to keep you up to date and help you learn.

If you're looking for a more specialized service that focuses on stock predictions, SparkTrade offers daily long and short signals for more than 3,500 US listed equities. It offers a Prediction Index and a variety of portfolio options to help you manage your trades. It could be a good option if you're interested in actively managing your portfolio and making predictions that can help you make money.