Help to Cumulative Delta Code

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Need help to this code, I think it should be simple, but cant figure it out
The build in cumulative delta, prints very tiny bars after zoom in or out.

I have removed everything I think is unnecessary from the original code and now it works just fine and remembers the thickness of the bars. The only thing I would like more is that it would print upbars in upColor and downbars in downColor.

Code:

const predef = require("./tools/predef");
const meta = require("./tools/meta");

class MyCD {
init() {
this.last = 0;
}

map(d, i, history) {
    const delta = d.offerVolume() - d.bidVolume();
    const open = this.last;
    const close = open + delta;
    const range = Math.abs(open) > Math.abs(close) ? open : close;
    const prevd = i > 0 ? history.prior() : d;

    const result = {
        open,
        close,
        delta,
        value: range
    };

    this.last = close;
    return  result; 
    
    
    
    
}

}

module.exports = {
name: “My CD”,
calculator: MyCD,
params: {
upColor: predef.paramSpecs.color(‘lime’),
downColor: predef.paramSpecs.color(‘red’),
},
inputType: meta.InputType.BARS,
areaChoice: meta.AreaChoice.NEW,
scaler: predef.scalers.singlePath,
plotter: predef.plotters.cumulative,
plots: {
delta: “Delta”
},
schemeStyles: predef.styles.solidLine(“delta”, {
color: “#ffffff”,
//color: deltaColor,
lineWidth: 5
})
};