Recuperando opaaes binarias
The broker needs you to lose, otherwise he would not make any profit. Even if he really pays out your wins, and even if he does not manipulate the price curve, he can still control your profit with his payout factors. So it seems that even if you had a winning system, the broker would just reduce the payout for making sure that you lose in the long run.
It can in fact be of advantage for the broker to offer a payout that allows you to win, as long as most other traders still lose.