How could I (layman investor) implement my own stock trading model?
I see that some traders/investors have built their own trading models (using Excel or C++ etc). Note: I'm not talking about HFT, but about something that I could use for my own trading purposes (I'm not a day trader).

Are there any open-source models that I can just build upon, instead of having to start out from scratch? What tools could I use?

Any tips on where to begin?

How could I (layman investor) implement my own stock trading model?
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I see that some traders/investors have built their own trading models (using Excel or C++ etc). Note: I'm not talking about HFT, but about something that I could use for my own trading purposes (I'm not a day trader).

Are there any open-source models that I can just build upon, instead of having to start out from scratch? What tools could I use?

Any tips on where to begin?
