Would you be using the same calculations and methods for stoploss on different instruments, ie for fx as for stocks, bonds etc?
Yes, position sizes are all volatility based so "equal out" across asset classes. The actual stoploss would often be on the other side of a multi-year high / low that if hit would signal trend continuation invalidating the initial entry. If the trend does start to reverse (stoploss doesn't get hit), I would build up / scale into a position over a period of weeks or even months depending how long the accumulation / distribution phase lasts.

