Not for me to say @Mickbuffet2 - I don’t trade this precise set up personally, but my own is indeed rather similar.
But I would definitely say that this is not automatically a winner!
It is a discretionary system in so far as the trader subjectively evaluates the merits of each signal and selects those that are considered viable. Also each trader will have their own criteria for their exits e,g, where to set stops and targets - and that means every trader’s results will be different.
The basic concept here is logical but it requires a market that is either trending smoothly or ranging over a very broad range in order that the MA’s stay apart long enough to produce a profit, Otherwise the method will just whipsaw rather painfully. This is particularly important with short TFs where signals occuring during the main LDN and NY sessions are most likely to produce results. Other times, and public holidays, and days before important data releases should always be treated with caution!
This means the choice of currency pairs is very critical to the success of this method and one approach to this aspect might be to study the thread here on BP called: " Trading the Trend with Strong Weak analysis". This will give you some ideas about which currencies are currently trading strongest against each other and perhaps offer the most potential.
The RSI is one filter and this method does need filters. But there various ways that one can achieve that.
Here is an example I just happened to spot where you can see the RSI filter worked and did not confirm a very small crossover on a 4H EURJPY chart (the RHS circles).