Manual trading is currently much better then automatic trading in my opinion (I am not speaking about risk desk ea's as those are fantastic for helping manage your psychology and the amount of risk you use daily, weekly, monthly, as well as automatically adjusting stop loss based on redetermined settings) but in terms of fully automated trading systems, I hate them for a few reasons, first of all, when using a fully automated system, the majority of them don't teach the strategy behind the system, if you can't trade an automated system manually due to not understanding the mentality and rules of it, you won't know which market conditions to run it. You can have the best algo in the world, but if it is designed to make money during high volatility markets, and you run it during low volatility markets, you will lose money. It is my belief that unless you create your own algo, and understand its strengths as well as weaknesses I would stay away from fully automated systems (unless you learn to trade the strategies the system uses manually and understand when it is best to trade it) to put it in simple terms, whenever you design an algo, it is used for specific types of markets as you can never account for the news or take into account every single market condition. The reason manual trading is great is that as long as you have a comprehensive plan, you can take into account news releases, market sentiments, market volatility, and adjust your strategy based on current conditions. That is why so many automated robots lose people money, they work amazing in the marketplace setting they were designed for, but otherwise lose in the things that weren't taken into account, or don't favor their strategy, ask if I am unclear, I just had 4 wisdom teeth removed so my thoughts are a bit unclear, any questions and I would be glad to clarify.
Slow and Grow or Fast and Blow