Need supporting `bar_index[len]` in `line.*`

[dcaoyuan]

Test case:

line.new(bar_index[rightLen], ph, bar_index, ph, color=color.red, width=2, style=line.style_solid)

Where bar_index[rightLen] will return NaN, seems bar_index[len] not supported yet.

I tried to find a quick solution, but no clue yet.

[dcaoyuan]

The easiest way is to add a bar_index: new Series([]) like:

    public data: any = {
        open: new Series([]),
        high: new Series([]),
        low: new Series([]),
        close: new Series([]),
        volume: new Series([]),
        hl2: new Series([]),
        hlc3: new Series([]),
        ohlc4: new Series([]),
        hlcc4: new Series([]),
        bar_index: new Series([]),
    };

I have some rough code, seems work, but not sure if it's a good solution.

[alaa-eddine]

We can discuss it after the next release,
I'll push a major update soon :)