“The best strategy for trading forex” does not exist. A successful trader uses a good and proven system and trades with discipline and efficient money management rules. A trader needs to find the best strategy according to their trading style, their capital, their personal aptitude, and their time availability.
A strategy that works for some traders does not necessarily work for all traders. A trader who prepares to trade with economic news does not use the same strategy that a swing trader or a trend follower. Strategies can vary during the time that a position is held. They could be based on technical or fundamental analysis or using a combination of both.
A successful strategy should not only be focused on how to make the most pips, but also how to avoid losing a significant portion of the capital in bad trades.