Action Alert: Significant Topping Signal Appears On $ADSKShares of Autodesk, Inc. (NASDAQ:ADSK) shot higher in early trading, only to reverse into the close. The stock hit a new multi-year high before staging the impressive reversal. This is a bearish sign and the candle formation is known as a topping tail. Topping tails by definition are bearish reversal signals. Investors should be fully aware that big money is selling and smart money is shorting.