# Alligator Indicator (SDK Trading)

registerIndicator("alligator", "A series of Bill Williams' indicators(v1.0)", function (context) {
    var dataInput = getDataInput(context, 0)
    var dataOutputJaws = getDataOutput(context, "jaws")
    var dataOutputTeeth = getDataOutput(context, "teeth")
    var dataOutputLips = getDataOutput(context, "lips")

    var method = getIndiParameter(context, "method")
    var jawsPeriod = getIndiParameter(context, "jawsPeriod")
    var jawsShift = getIndiParameter(context, "jawsShift")
    var teethPeriod = getIndiParameter(context, "teethPeriod")
    var teethShift = getIndiParameter(context, "teethShift")
    var lipsPeriod = getIndiParameter(context, "lipsPeriod")
    var lipsShift = getIndiParameter(context, "lipsShift")

    var calculatedLength = getCalculatedLength(context)

    if ("smma" == method) {
        smma(dataInput, dataOutputJaws, calculatedLength, jawsPeriod)
        smma(dataInput, dataOutputTeeth, calculatedLength, teethPeriod)
        smma(dataInput, dataOutputLips, calculatedLength, lipsPeriod)
    } else if ("sma" == method) {
        sma(dataInput, dataOutputJaws, calculatedLength, jawsPeriod)
        sma(dataInput, dataOutputTeeth, calculatedLength, teethPeriod)
        sma(dataInput, dataOutputLips, calculatedLength, lipsPeriod)
    } else if("ema" == method) {
        ema(dataInput, dataOutputJaws, calculatedLength, jawsPeriod)
        ema(dataInput, dataOutputTeeth, calculatedLength, teethPeriod)
        ema(dataInput, dataOutputLips, calculatedLength, lipsPeriod)
    } else {
        lwma(dataInput, dataOutputJaws, calculatedLength, jawsPeriod)
        lwma(dataInput, dataOutputTeeth, calculatedLength, teethPeriod)
        lwma(dataInput, dataOutputLips, calculatedLength, lipsPeriod)
    }

    if (calculatedLength == 0) {
        setIndiShift(context, "jaws", jawsShift)
        setIndiShift(context, "teeth", teethShift)
        setIndiShift(context, "lips", lipsShift)
    }
},[{
    name: "jawsPeriod",
    value: 13,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [1, 100]
},{
    name: "jawsShift",
    value: 8,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [0, 30]
},{
    name: "teethPeriod",
    value: 8,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [1, 100]
},{
    name: "teethShift",
    value: 5,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [0, 30]
},{
    name: "lipsPeriod",
    value: 5,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [1, 100]
},{
    name: "lipsShift",
    value: 3,
    required: true,
    type: PARAMETER_TYPE.INTEGER,
    range: [0, 30]
},{
    name: "method",
    value: "smma",
    required: true,
    type: PARAMETER_TYPE.STRING
}],
[{
    name: DATA_NAME.HL2,
    index: 0
}],
[{
    name: "jaws",
    visible: true,
    renderType: RENDER_TYPE.LINE,
    color: "steelblue"
},{
    name: "teeth",
    visible: true,
    renderType: RENDER_TYPE.LINE,
    color: "#4EC2B4"
},{
    name: "lips",
    visible: true,
    renderType: RENDER_TYPE.LINE,
    color: "#DE5029"
}],
WHERE_TO_RENDER.CHART_WINDOW)