Here is an example of a well-known system for SP500 futures., which is impeccable, brought profit almost without drawdown 10 years, from about 1985 to 1995 of the year. Then something changed in the market and the end of the system, and very unexpected and cruel for those, who believed that this was just a temporary drawdown.
I heard that any trend system also earns on the RTS futures. Think, you should be careful and watch the market closely so as not to miss a moment, when there are no housewives left who do not trade futures on the RTS according to the trend system on hourly timeframes :)