@Brightoilthere's no hard and fast rule
it's, how much money you have, how much money you are prepared to risk, how much money are you prepared to lose
e.g i have $100 000, i'm willing to risk $10 000 on stock XXX, i'm going to walk away if i lose $1000,
so i buy 10 000 shares at $1.00 and if it hits my target price of $1.20 then i walk away,
but if it goes south, and hits $0.90 cents, then i run away, and have only lost 1% of my total capital
there's no right or wrong answer, each punter is different, and has a different risk tolerance
but if you stick to a basic stock loss, like the scenario above, then at least you'll have $99 000 to play with again
cheers
