Both of you are correct
each one has his strategy
you can see one is selling a pair while the opposite one is buying but in the final both of them are winners/losers
so, more people are misunderstanding the Martingale or they are using it bad hard use
it is really hard and risky but this is the Forex
for me I have polled as YES
I use it, but do not trade on any pair that is about to get news.
Works really well for me.