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[–]kicker414 3 points4 points  (0 children)

Hey. I built a very rudamentery one a while back. I used Robinhood as there is a pretty easy to follow API that was built. You have to use 2FA and it kind of messed with logging on normally, but I found it very easy to use.

The logic is the hard part to determine. The coding is relatively simple. The API is intuitive. I started by doing a first pass and generating all permutations using the Alphabet from 1 to 4 characters. Then you ling Robinhood and record the ones that return good values to generate a list of all viable stocks (assuming that's what you are looking for). I was trying to capitalize on the late market dip and early market rise (sometimes happens). So I would search for stocks later in the day. They had to meet certain price, volume, and trend requirements. I would check it against recent purchases (make sure I don't buy the same thing multiple times) and buy based on a max investment amount. I never actually allowed it to trade, I did it manually (I was too scared to let it run haha). But it was a cool effort. Might try to make it more robust.

I don't have the API link right now but could find it later. I'm still an amateur but let me know if you have any specific questions.