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Explain meaning of first demo backtest

Hi guys. I am neither entrepreneur nor investor. I am a researcher at Ulsan university, Korea with Master Position in Computer Science. I am totally new to this kinda predicting stock. My topic research is to predict stock using algorithm and python language. I do my research and make a demo backtesting. This is the result. I have no idea about what kind of information after running backtesting complete. What is Benchmark returns, 2 line Algorithm and benchmark (SPY) display what information, etc...
You guys who have much experiences in this sector. I am really appreciated.