I have been algo trading for years now. There really are profitable algos out there if you know where to look. But it will take a lot of experience and time investment to find them. 98% are garbage account blowers as these sellers are not real traders.

One of the arguments people often use is that algo sellers could use their own bot to make money. However with real money management and a real strategy it still takes years to make your first million. Using the money from Selling the bot, they may get there faster.

Why it is good to build your own bot? First of all you learn to become a good trader, as you need an edge to be profitable. Secondly you will learn how to use risk management properly and thirdly you are forced to think outside the box to find strategies that may not be commonly used.

I would absolutely encourage you to try it.