American Airlines Group (NASDAQ:AAL) has reversed at all-time highs and is forming a potential topping tail. Topping tails are bearish signals. When this occurs at a high, it tells traders and investors that a fall is on the horizon. The iShares DJ Transport Average Index (ARCA:IYT) is also having a very weak day, coming off all-time highs. This relative weakness and reversal speak to a broader transport signal of downside. Look for this to be a significant longer term top in the transports and in American Airlines Group.