Can't see why not. As I say, depends on your entry. If you take high probability trades, defined as 90% trades result in a profit of at least 1 pip with a trailing stop), but there's a small chance of taking a 50 pip loss that happens twice in the year, you might only break even. Without seeing your system in action, over a few months, it's hard to tell. You cannot just plug in figures like 90% and 50 pip stops and targets of 200 pips. There's no equation to guarantee an end result in trading. I know it doesn't help, but the only way is to backtest then forwardtest.