Thêm một chỉ báo vào biểu đồ chart.Posn()

# Compute the SMA50
sma50 <- SMA(x = Cl(__), n = ___)

# Compute the SMA200
sma200 <- SMA(x = Cl(___), n = ___)

# Compute the DVO_2_126 with an navg of 2 and a percentlookback of 126
DVO_2_126 <- DVO(HLC = HLC(___), navg = ___, percentlookback = ___)

# Recreate the chart.Posn of the strategy from the previous exercise
chart.Posn(Portfolio = portfolio.st, Symbol = "___")

# Overlay the SMA50 on your plot as a blue line
add_TA(sma50, on = ___, col = "___")

# Overlay the SMA200 on your plot as a red line
add_TA(sma200, on = ___, col = "___")

# Add the DVO_2_126 to the plot in a new window
add_TA(___)