We assume that you are an expert in stock trading, and there is no problem in stock trading operation.
First of all, you should learn to program and debug programs, which is the program basis of your automated trading.
Then you should learn to write stock indexes, so that you can connect with your own programs in the future.
This is already a lot of study and workload.
The most important thing is that automated trading software can't guarantee to win profits, which you shouldn't question, because stock trading is too procedural, and winning for a while won't last forever. No matter how much you sell, the fee-based stock trading software is a fool. A person who can write such a good program will not have the time and need to sell the software, but it is all for making money. Why don't programmers earn back all the wealth in the world first?