First of all how much do you want to invest? divide that by four. as the stock drops (because you are looking for value) buy. at the same time pick the amount you want to make on the stock. 10%? 20%? Pick your bailout percent (use a trailing stop that is a percent not a dollar amount). Buy 1/4 to start then add to this as the stock moves up or down. buy and hold is dead! you have to be ready to bailout when you reach your support level or your profit level. your trailing stop should be at 3% - 5%. you can always buy again if your stop is wrong and then adjust amount to get to your comfort level. investing is all about sleeping at night.