What is the minimum money to start operating automatically in the stock market? I mean the market of stoks
It will depend on your transaction cost which can be calculated as the broker commission as well as the spread of the stock.
If you invest $100 and your cost is $20 then it is probably not worth it because you are paying 20% in commissions right off the bat. You could get a better return elsewhere.
But if you invest $100 and your cost is $1 then your cost is only 1% – much better.
I would advise trying to keep your transaction cost at no more than 2%.