Why won't this code run in Pine Script 4? "Undeclared identifier"

Question

Resources are still Pine Script 3 heavy, so I think I'm mixing something up:

I tried to create an Average Daily Range indicator, which is basically the ATR that takes a "D" input no matter what the time frame of the current chart is. My code works perfectly fine on Pine Script 3, but Pine Script 4 throws out the following errors:

line 4: Undeclared identifier `resolution`;
line 6: Undeclared identifier `tickerid`;
line 6: Undeclared identifier `dRange`;
line 8: Undeclared identifier `adRange`

The docs indicate resolution is still an input() argument, and I'm not sure why anything else is called "undeclared".

My full code is:

//@version=4
study(title="Average Daily Range", shorttitle="ADR", overlay=false)

dRange = input(defval="D", title="Daily Range", type=resolution)

adRange = security(tickerid, dRange, rma(tr, 5))

plot(adRange, title = "ADR", color=#000000, transp=0)

What are these "Undeclared identifiers"? And what must I do differently in Pine Script 4 so that I'm getting the same result?

Thank you.

Solution 1

v4 RefMan is here: https://www.tradingview.com/pine-script-reference/v4/

v4 UserMan is here: https://www.tradingview.com/pine-script-docs/en/v4/index.html

Since compiler is returning an error on line 4 which uses input(), makes sense to look up the function in refman, where you will find that the proper argument to type= parameter for what you want is now input.resolution. Being unable to initialize variable dRange because of the error, the compiler also gives an error on that variable. Same goes with adRange, which you've fixed.

Solution 2

I solved it, but still don't know what "undeclared identifiers" were. I assume it's just Pine's way of saying that dRange violated the new rules with its variable resolution, and that adRange was creating problems with the un-used tickerid, which has been replaced by syminfo.tickerid in PineScript 4.

//@version=4
study(title="Average Daily Range", shorttitle="ADR", overlay=false)

adRange = security(syminfo.tickerid, "D", rma(tr, 5))

plot(adRange, title="ADR", color=#000000, transp=0)