you can also use some indicators not only use martingale. and the news is very very important too... well it is also depends on what kind of trader you are.... for me i use martingale but with the help of my indicators..
Using martiangle trading strategy is good, but when the market become so volatile, and our trades against the trend, then it will be dangerous for us. Martiangle trading makes us open so many trades at the same time without stop loss, we can get stop out if we dont have enough margin to maintain our open positions