Originally Posted by
boneil
Why did the stock dip? Did the stock drop because the overall market was down or was it company related. Something that I do is look at a historical chart to see what are the sizes of normal dips for a stock. If a stock has a history of dropping 30% once a year, then there's your answer. But it always boils down to do you think the price is cheap? And understand that someone sold you that share thinking the stock was still expensive.
Some people use moving averages, 50day or 200 day to buy on the dips. Sometimes they use price levels on a chart.