pine-script - 颜色变化警报

Question

我试图在线条颜色变化时保持警惕。此代码会在我不想要的每个栏上发出警报。

study("Tillson T3", overlay=true)
length1 = input(8, "T3 Length")
a1 = input(0.7, "Volume Factor")

e1=ema((high + low + 2*close)/4, length1)
e2=ema(e1,length1)
e3=ema(e2,length1)
e4=ema(e3,length1)
e5=ema(e4,length1)
e6=ema(e5,length1)
c1=-a1*a1*a1
c2=3*a1*a1+3*a1*a1*a1
c3=-6*a1*a1-3*a1-3*a1*a1*a1
c4=1+3*a1+a1*a1*a1+3*a1*a1
T3=c1*e6+c2*e5+c3*e4+c4*e3

col1= T3>T3[1]
col3= T3<T3[1]
color = col1 ? green : col3 ? red : yellow
plot(T3, color=color, linewidth=3, title="T3")

alertcondition(col1, title='Alert on Green Bar', message='Green Bar!')
alertcondition(col3, title='Alert on Red Bar', message='Red Bar!')

Answer 1

好吧，只要is的condition参数，你就会得到一个警报。alertcondition()true

如果您绘制col1and col3，您将看到为什么会收到多个警报。这是因为其中一个会留true在多个酒吧。你需要的是一个脉搏。

要创建一个脉冲，您需要考虑您的实施。您的实施保证了这一点，col1并且col3永远不会true同时发生。因此，您可以比较col3[1]和col1。因此，如果col3[1] and col1为真，则表示前一个柱col3为真，但仅当前柱col1为真，表示从col3到的变化col1。

看看下面的代码和图表：

//@version=3
study(title="Color", overlay=false)
T3 = close
col1= T3>T3[1]
col3= T3<T3[1]
isNewCol1 = nz(col3[1]) and col1
isNewCol3 = nz(col1[1]) and col3

plot(series=isNewCol1 ? 1 : 0, title="isNewCol1", color=orange, linewidth=4)
plot(series=isNewCol3 ? 1 : 0, title="isNewCol3", color=blue, linewidth=4)

编辑：

您只需要在alertcondition().

study("Tillson T3", overlay=true)
length1 = input(8, "T3 Length")
a1 = input(0.7, "Volume Factor")

e1=ema((high + low + 2*close)/4, length1)
e2=ema(e1,length1)
e3=ema(e2,length1)
e4=ema(e3,length1)
e5=ema(e4,length1)
e6=ema(e5,length1)
c1=-a1*a1*a1
c2=3*a1*a1+3*a1*a1*a1
c3=-6*a1*a1-3*a1-3*a1*a1*a1
c4=1+3*a1+a1*a1*a1+3*a1*a1
T3=c1*e6+c2*e5+c3*e4+c4*e3

col1= T3>T3[1]
col3= T3<T3[1]
isNewCol1 = nz(col3[1]) and col1
isNewCol3 = nz(col1[1]) and col3
colorP = col1 ? green : col3 ? red : yellow
plot(T3, color=colorP, linewidth=3, title="T3")

plotshape(series=isNewCol1, title="col1", style=shape.triangleup, location=location.belowbar, color=green, text="Green", size=size.normal)
plotshape(series=isNewCol3, title="col3", style=shape.triangledown, location=location.abovebar, color=red, text="Red", size=size.normal)
alertcondition(condition=isNewCol1, title="isNewCol1", message="green")
alertcondition(condition=isNewCol3, title="isNewCol3", message="red")

Answer 2

buy= T3>T3[1] and T3[1]<T3[2] 
sell= T3<T3[1] and T3[1]>T3[2]  
color = T3>T3[1] ? green : T3<T3[1] ? red : yellow
plot(T3, color=color, linewidth=3, title="T3")
alertcondition(buy, title='Alert on Green Bar', message='Green Bar!')
alertcondition(sell, title='Alert on Red Bar', message='Red Bar!')