#16-KD-1.pine

//@version=4
study(title="KD指標", shorttitle="KD", overlay=false)

Length = 9
DLength = 3

vFast = stoch(close, high, low, Length)     // KD的快線
vSlow = sma(vFast, DLength)                 // KD的慢線
vSlow2 = sma(vSlow, DLength)                // KD再平滑一次

K = vSlow
D = vSlow2

plot(K, color=color.blue, title="K")              
plot(D, color=color.red, title="D")