Just curious as what everyones exit strategy on a stock is? More specifically, how do you calculate a max price of a breakout? Ive been using a strategy I call 10/30 rule. -10% stop and exit at a gain of 30% .

Maybe Im a newbie but it seems many of the stock I pick just dips around 50% so 30% seems like a good time to exit with a good profit. I put a stop at 10% under the last ask price so that just incase i miss the 30% or I let the stock rise even higher, I still exit with a good amount of profit.