$NYA 21-day EMA vigilance watch - * see the lowest element in this daily chart for two $NYA moving averages now requiring close vigilance https://stockcharts.com/c-sc/sc?s=%24NYAD&p=D&yr=0&mn=6&dy=0&i=p16612807292&a=286429918&r=1586300495239 $NYA daily chart with other index symbols - * vigilance watch the 21-day EMA smoothing of the McClellan Oscillator ( McO ), which the bulls still require a lasting advance by this moving average above the McO zero line https://stockcharts.com/c-sc/sc?s=%24NYA&p=D&yr=1&mn=3&dy=0&i=p51392678417&a=626294982&r=1586301059687