Shares of Dynatrace (DT 0.28%) dropped 13% last month, according to data provided by S&P Global Market Intelligence. Investors were disappointed by its quarterly-earnings report; sales, cash flow, and key performance metrics were generally solid, while the company's forecasts and forward-looking commentary raised some concerns.Investors are worried about weak revenue guidanceDynatrace shares dropped after its Feb. 8 quarterly report and continued to slide lower throughout the month. The company narrowly bea ...