I'm very skeptical of systems that claim to help with trading signals. Primarily because if you had a system, then you would use it yourself. Trading is pretty much a zero sum game especially when it comes to signals. If you had a profitable signal and you publicized it, it would disappear almost immediately. If your performance is correct and you're getting 200% per year, why sell the sauce for $20 a month? I would…
This is typically true for day trading signal services. I'm very skeptical of them too. I've tried many of them and none worked for me. There are a lot of scams. The best model I tried was from The Technical Traders. They offer a trend based model for SPX/QQQ and they consistently outperform buy and hold for 10+ years now. We were inspired by their service and wanted to take a modern spin on trend based models with a…
It would be trivially easy to build an algo that beats the market 90% of years but 10% has huge losses. Just construct a slightly levered portfolio, with some protection against minor losses, but totally exposed to big losses.
If you sold that, it would appear like its working for awhile and you'd probably have lots of trusted customers by the time it fails.
(I'm a bit cynical, I worked in finance briefly, and I realized the fund we were selling to investors was essentially this)