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 more affordable price point (they charge $2500yr).
Trend changes don't happen all that frequently. Therefore, they wont disappear immediately either. Timing trend changes correctly can make a huge difference.
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 more affordable price point (they charge $2500yr).
Trend changes don't happen all that frequently. Therefore, they wont disappear immediately either. Timing trend changes correctly can make a huge difference.