On a platform that only supports Forex (etc.) backtesting and not Binary Options (on a Forex asset), is there a mathematical model to embed it?

So, I'm using MetaTrader5 to get data and form a Binary Options bot, but to backtest I've just been keeping track (within my EA code) virtual binary Up/Down orders paired with expiry and bet amount. And if it turns out to be a winner, then incrementing a counter. Then periodically displaying win rate on chart. However, to be sure I'm not deluding myself into thinking I've got a winning EA for binary options, I thought there might be a way to backtest it in a Forex environment. I googled and t