删除除最后一个以外的所有先前的买入卖出信号

Question

Is it possible to remove all previous Long and Short signals Except the last one..? Here is the code

`long = longCond and CondIni[1] == -1
short = shortCond and CondIni[1] == 1
alertcondition(long, title="Long", message="Long")
alertcondition(short, title="Short", message="Short")`

Here what i use after searching on google

`var lastLong = longCond and CondIni[1] == -1
var lastShort = shortCond and CondIni[1] == 1

var long = false
var short = false

if (lastLong)
    long := true
else if (lastShort)
    short := true
else
    na`

But it doesn't work. and it doesn't even show the ongoing signals.

Answer 1

You cannot remove the shapes created by plotshape() .

If that is your goal, you should use label s instead.

You would do it by creating a new label whenever your condition is true and deleting the old one.

// Create a new label
lbl = label.new(bar_index, high, "Buy", yloc=yloc.belowbar, style=label.style_label_up)

// Delete the old label
label.delete(lbl[1])    // Delete the old label