# Accelerator Oscillator (SDK Trading)

registerIndicator("ac", "Accelerator Oscillator(v1.0)", function (context) {
    var dataInput = getDataInput(context, 0)
    var dataUp = getDataOutput(context, "up")
    var dataDown = getDataOutput(context, "down")
    var dataFSMA = getDataOutput(context, "fastSMA")
    var dataSSMA = getDataOutput(context, "slowSMA")
    var dataOutputMain = getDataOutput(context, "main")
    var dataOutputSignal = getDataOutput(context, "signal")

    var fSMA = 5
    var sSMA = 34
    var sgnlSMA = 5

    var calculatedLength = getCalculatedLength(context)
    var i = calculatedLength

    if (i == 0) {
        dataFSMA[0] = dataInput[0]
        dataSSMA[0] = dataInput[0]
        dataOutputMain[0] = 0
        i++
    } else if (i == 1) {
    } else {
        i--
    }

    sma(dataInput, dataFSMA, calculatedLength, fSMA)
    sma(dataInput, dataSSMA, calculatedLength, sSMA)

    while (i < dataInput.length) {
        dataOutputMain[i] = dataFSMA[i] - dataSSMA[i]
        i++
    }

    sma(dataOutputMain, dataOutputSignal, calculatedLength, sgnlSMA)

    i = calculatedLength

    if (i == 0) {
        i++
    } else if (i == 1) {
    } else {
        i--
    }

    var prev, curr

    while (i < dataInput.length) {
        prev = dataOutputMain[i - 1] - dataOutputSignal[i - 1]
        curr = dataOutputMain[i] - dataOutputSignal[i]

        if (prev <= curr) {
            dataUp[i] = curr
            dataDown[i] = 0
        } else {
            dataUp[i] = 0
            dataDown[i] = curr
        }

        i++
    }
},[],
[{
    name: DATA_NAME.HL2,
    index: 0
}],
[{
    name: "up",
    visible: true,
    renderType: RENDER_TYPE.HISTOGRAM,
    color: "#6CBA81"
},{
    name: "down",
    visible: true,
    renderType: RENDER_TYPE.HISTOGRAM,
    color: "#ECAE93"
},{
    name: "fastSMA",
    visible: false
},{
    name: "slowSMA",
    visible: false
},{
    name: "main",
    visible: false
},{
    name: "signal",
    visible: false
}],
WHERE_TO_RENDER.SEPARATE_WINDOW)