Ask an Algo Dev – 6 HRT quants answer common questions about their role [video]
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If you are interested in algorithmic trading, have some Python and Pandas background, I published a tutorial this week that goes in detail about how to develop algorithms, trading strategies in this case, where does the excessive profit comes from and how to backtest your trading ideas:
https://tradingstrategy.ai/blog/outperfoming-eth
For very simple strategies, PhD in math and statistics is unnecessary (albeit helpful).