Hi Bracke,
Another interesting question! Funnily enough I don't have a target price at all at the moment!
Occasionally, I've used targets before and aimed for a 2:1 ratio between target distance vs S/L distance.
My methods don't tell me how far an instrument is likely to move, just the direction. My exit is more time-based than target based. I try to time my exit to be at the peak (long) or trough (short) of 2 stochastic cycles after I've entered. To reduce risk I'm taking 50% profits after the 1st cycle. When an instrument is peaking in my favour, I use a trailing stop-loss to exit the trade.
A new feature in my revised method is to use parabolic SAR to exit if an instrument starts trending very heavily in my favour.
Cheers,
Mark