yup, I'm sure there is a strategy that can give 100% win if implemented by the rules. such as "swap hunter"
and open a two-way trade position opposite each other with the same lot size. choose a broker that uses
a trading platform with 5 decimal places and let hedging and reverse trading, use a swap account,
select the pair that has the lowest spread with high difference swap. use in long-term trading ...
of course you can use 50% or more of your free margin without any risk!