CODEWITHSUNDEEP
pine-scripttrading
Sven
Sven

Reputation: 45

How to plot the result from highest defining the number of bars with barssince

Try to plot the value of the highest bars between current bar and the last cross of ema(50) and ema(200) using barssince(cross(ema50,ema200)). The function highest() wants an integer and the Barssince gives a series integer. All variants getting the error that pine connot compile with error:

line 4: Cannot call `highest` with arguments (series[integer]); available overloads: highest(series, integer) => series; highest(integer) => series Script.

//@version=3
study("My Script")
o = 0
o := highest(barssince(cross(sma(close,50),sma(close,200))))
plot(o, color = yellow)

The ema cross is just an example. The highest() function with a calculated number of bars with barssince is my goal.

How do I convert the result form barssince to an integer accepted by highest()? Or is there a different solution?

Upvotes: 0

Views: 3953

Answers (2)

Michel_T.
Michel_T.

Reputation: 2821

Implement the function highest by yourself:

//@version=3
study("My Script", max_bars_back=5000)

highest_pine(src, len) =>
    max = src[0]
    for i = 1 to len
        if src[i] > max
            max := src[i]
    max

o = 0.0
o := highest_pine(close, barssince(cross(sma(close,50),sma(close,200))))
plot(o, color = green)

Upvotes: 3

user10417531
user10417531

Reputation:

The reference is pretty confusing, but after playing around with your function a bit I managed to make it work:

There are two overloads for the highest() function: - highest(length), this one takes an integer and returns a series - highest(source, length), this one takes a series and an integer There is a hint in the function reference, saying that One arg version: x is a length. Algorithm uses high as a source series.

Checking the reference for barssince() I see that it takes a bool (logical condition) and returns a series of integer.

Now it is clear that the highest(barssince(true)) is not the correct syntax because barssince() will return a series and not an integer, while highest() expects and integer or a series and and integer.

From poking around and searching online I reached a conclusion that it is not possible to have a variable of integer in pine script that is not a series at the same time. This leads me to believe that the highest() function cannot be used dynamically.

I was able to mimic the behavior using if statement, along with the help of this migration guide

This is the version of the script that works for me, it plots a line at the max() of the highs, resetting if there is a new MA cross.

//@version=3
study("High since SMA Cross")

fast_sma = sma(close,10)
slow_sma = sma(close,20)

high_since_cross = 0.0
resistance = if(cross(fast_sma, slow_sma))
    high
else
    max(nz(high_since_cross[1]), high)
plot(resistance, color=yellow)

Upvotes: 0

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