Chart image: link

Do you know why is that?

Version 2

protected override void Initialize()
        {
            mma = Indicators.MovingAverage(Bars.ClosePrices, mmaLength, maType);
            [...]

        }

None of them showed any difference.

I made two versions of this indicator to see the difference the BARSCLOSE1000 indicator does by multiplying the closing price by 1000.

Version 1 (only modifications)

[...]

private IndicatorDataSeries source;

[...]

protected override void Initialize()
        {
            source = CreateDataSeries();
            mma = Indicators.MovingAverage(source, mmaLength, maType);
            smma = Indicators.MovingAverage(mma.Result, smmaLength, maType);

            [...]
        }

public override void Calculate(int index)
        {
            source[index] = Bars.ClosePrices[index] * 1000;