Sometimes a support or resistance level can retain their importance for a long time. It could be days, weeks, months or even years. Traders refer to this as market memory.As you can see on the following chart, this is the case with the $84.50 level for shares of Dollar Tree Inc DLTR. This level has been important for years. This is why our team of trading experts has made it our “Stock of the Day.”The stock found support there in September 2020. Then it reversed and rallied. One year later in September 2021 ...