https://profitable-expertadvisors.blogspot.com/2018/06/why-do-most-trading-robots-eas-fail.html If a trader makes a breakout ea , it will fail when there are no breakouts. If a trader makes a trend ea , it will fail when there are no trends. If a trader makes a ranging ea , it will fail when there are no ranges. The above are only 3 out of 100 different conditions for trading look at youtube videos on factory robots, robots in mercedes factory, robots in bmw factory.Do a google search as follows, click and observe how many robots are used to make a car, then apply logic to market conditions for trading 100 different market conditions logic. It is inevitable , every robot fails sooner or later, when market conditions change.