It shouldn't be used that way, as an example of trade entries/exits.
Unfortunately, some of the authoritative-looking material with which the site directly and indirectly attracts traffic has no real validity.
Somewhere along the line you're going to need an understanding of price action.
I'm not suggesting you should avoid indicators, but the people who are trading profitably with indicators also have a good understanding of price action parameters. Acquiring that takes time and experience.
Many successful retail traders are using one or two indicators (rarely more) to determine "trend", according to their own system definitions, and then using price action to time their entries in accordance with the trend their indicators have determined.
A moving average crossover with one or two additional rules could be a perfectly good way of identifying the trend.
It's a mistake to imagine that one can easily find a working system with a real edge and just copy it, without that understanding, and that everthing will work out ok.
It almost never does.
The reasons that's so also need quite a bit of experience, to be understood.
Sorry for telling it like it is.
No, it definitely isn't.
And nobody should be trading with real money without having a real edge (but of course large numbers of people are - many of them don't even know how to tell whether they have a real edge and are just trading on a wing and a prayer and a Fib level and thinking something like "Well, it said so on some authoritative-looking website, and loads of other people seem to believe it". Those aren't people who are making a profit.)
But there's much, much more to developing one than moving average crossovers and Fib levels, and it isn't a quick or easy thing to do.
Again, sorry for telling it like it is.