I 100% agree. NinzaCo's marketing (and many others like it) is all about visual impact and instant gratification. A video can never, and I mean never, be the basis for judging a trading system. Videos are, by definition, 'cherry-picked', meaning they only show the specific market segments where the indicator worked perfectly!
To consider a trading system truly reliable and profitable, you need much more than a few catchy clips. Here is what actually matters:
Rigorous Statistical Backtesting: 10 trades are not enough. You need a sample size of hundreds, if not thousands, of trades across different market cycles (trends, sideways markets, high and low volatility).
Max Drawdown Analysis: The real question isn’t 'how much does it make when it wins,' but rather 'how much do you lose and how long do you stay in the red' when the system inevitably goes through a losing streak.
Profit Factor and Risk/Reward: A system that wins 90% of the time but has a terrible risk/reward ratio (where one single loss wipes out ten wins) is destined to fail.
Forward Testing (Live or Demo): You have to see how the system reacts in real-time, accounting for spread, slippage, and actual volatility.
Robustness and Overfitting: Many of these indicators are over-optimized for past data. They worked great yesterday, but they will stop working tomorrow because they cannot adapt to changing market conditions.