Yes, I understand your point. There are many algorithms and indicators that don't work as well as they appear in website images, so we need to try them ourselves in the live market or using playback to confirm whether they work well, repaint, or just simply selling an illusion. Personally, I never trust historical backtesting results on NinjaTrader, TradingView, or other platforms. That’s why I always ask the system to test it—to see if it truly works or is just another illusion.
If you have the algos or know someone who does, please share it with us so we can all learn. As Thomas Edison said:
"I have not failed 1,000 times. I have successfully found 1,000 ways that will not work."