It's difficult to say that one single Forex trading strategy is the best. In reality, there is no best Forex trading strategy. However, there are many good ones. Ultimately, it depends on you as an individual Forex trader.
The best currency trading strategy for you, won't necessarily be the best for another trader. The strategy you use will depend on a number of factors, such as how much time you have to dedicate to your currency trading and how much previous experience you have in trading currencies.
There are a number of common Forex trading strategies, including: scalping, news trading, range trading, swing trading, trend trading and carry trading - of course there are many more, but these are the ones that most Forex traders consider and especially when just starting out.
As a beginner, you will want to focus more on longer-term trading strategies in the Forex market. You might also not have a lot of time on your hands, because beginners tend to work full-time jobs and only trade currencies in their spare time. Although the currency market is open 24 hours a day, it is closed during the weekends and so many beginners who work full-time jobs have little time to spend on trading currencies. Because of this, they might want to focus on carry trading, for example. Using a carry trading strategy is fairly simple and is a long-term strategy that requires much less time to carry out. Carry trading is also ideal for beginners who want to minimize risk as much as possible.
On the other end of the spectrum you have strategies like scalping, which are definitely not suitable for beginners and especially not suitable for those who also have little time to spend in the FX market. Scalping is all about placing many trades per day. Scalpers focus on making modest profits on each of the tiny orders that they place, so that their modest profits accumulate to a more significant total. A lot more Forex trading experience is needed. If you want to scalp the Forex market, you should wait until you have gained some valuable experience, as well as a lot of knowledge of the market.
There are of course other factors, but when choosing a Forex trading strategy, you need to consider yourself as an individual trader. Think about what kind of time you have on your hands, how much experience you have (if any), what kind of currency pairs you will be looking to trade most, etc. As already implied, if you have little experience you should focus on more long-term strategies that allow you to minimize risk and make more modest (but more certain) profits. These long-term strategies will mean that you won't have to spend a lot of time in front of your Forex trading platform, which will allow you to study more and gain the currency trading knowledge that you need.
In conclusion, there is no best Forex trading strategy. When choosing a strategy to use, it's all about discovering which strategy will suit you and your own individual Forex trading career the best.