I recently invested a large amount with Binarymate, Finrally and Binarycent, who are all related. They offer the same and their own proprietary platform. That is the first issue. They definitely have some sort of dealer plugin running that causes traders to lose trades. They would spike the price against you a couple of seconds before expiry and have you lose the trade.
Dont use Binarymate, Finrally or Binarycent. If you lose, they win.