CODEWITHSUNDEEP
functionpine-script
VGh
VGh

Reputation: 59

Tradingview custom function with security()

I'm looking at the Pine version 3 migration guide and there's an example showing a custom function and using security() to call that function. https://www.tradingview.com/wiki/Pine_Version_3_Migration_Guide

Now I tried to change my custom function in order to return two values instead of one, but for some reason it doesn't work anymore. The error is on line 10 ("[t,i] = ...") and says: variableType.itemType is not a function.

My code below, can anyone advise what the issue is please?

//@version=3
study("My Script")

calcS() =>
    s = 0.0
    j = 0.0
    s := close + 1
    j := close + 2
    [s, j]
[t, i] = security(tickerid, '120', calcS())
plot(t, color=red, transp=0)
plot(i, color=blue, transp=0)

Upvotes: 0

Views: 2726

Answers (2)

PineCoders-LucF
PineCoders-LucF

Reputation: 8779

UPDATE

Starting with Pine v4 you can use functions returning tuples with security():

//@version=4
study("", "", true)
f() => [open, high]
[o, h] = security(syminfo.tickerid, "D", f())
plot(o)
plot(h)

Upvotes: 0

Ilya Muradyan
Ilya Muradyan

Reputation: 442

It's a known problem. You can't return tuple from security. It's in our plans to fix this bug.

Now you may use the following workaround:

//@version=3
study("My Script")

calcS() =>
    s = 0.0
    j = 0.0
    s := close + 1
    j := close + 2
    [s, j]

calcSs() =>
    [s, j] = calcS()
    s

calcSj() =>
    [s, j] = calcS()
    j

t = security(tickerid, '120', calcSs())
i = security(tickerid, '120', calcSj())
plot(t, color=red, transp=0)
plot(i, color=blue, transp=0)

Upvotes: 2

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