Its not as simple as converting rules followed by independent day trader into algorithms - most of them just do not rely on just technical analysis but also on fundamentals which is hard problem to decipher with all the hype around any stocks in the news and analyst of institutional investors influencing with the media news through various sources.

The best for you to start learning - would be to get a start on how the market works - my suggestion would be - https://www.amazon.com/dp/B000THOD1G/