Python Version of MACD Indicator Drawing Example

'''backtest
start: 2020-01-28 00:00:00
end: 2020-02-26 00:00:00
period: 1d
exchanges: [{"eid":"OKEX","currency":"BTC_USDT"}]
'''

ChartCfg = {
    '__isStock': True,
    'title': {
        'text': 'PythonDrawing'
    },
    'yAxis': [{
        'title': {'text': 'KLine'},
        'style': {'color': '#4572A7'},
        'opposite': False
    }, {
        'title': {'text': 'Indicator axis'},
        'opposite': True
    }],
    'series': [{
        'type': 'candlestick',
        'name': 'Current cycle',
        'id': 'primary',
        'data': []
    }, {
        'type': 'line',
        'id': 'dif',
        'name': 'DIF',
        "yAxis" : 1,
        'data': []
    }, {
        'type': 'line',
        'id': 'dea',
        'name': 'DEA',
        "yAxis" : 1,
        'data': []
    }, {
        'type': 'line',
        'id': 'macd',
        'name': 'MACD',
        "yAxis" : 1,
        'data': []
    }]
}

def main():
    global ChartCfg
    preTime = 0
    chart = Chart(ChartCfg)
    chart.reset()
    while True:
        while True:
            r = _C(exchange.GetRecords)
            if len(r) > 50:
                break
        # Calculate indicator
        macd = TA.MACD(r)
        
        LogStatus(_D(), len(r))
        
        # Drawing
        for i in range(len(r)):
            if r[i]["Time"] == preTime:
                chart.add(0, [r[i]["Time"], r[i]["Open"], r[i]["High"], r[i]["Low"], r[i]["Close"]], -1)
                chart.add(1, [r[i]["Time"], macd[0][i]], -1)
                chart.add(2, [r[i]["Time"], macd[1][i]], -1)
                chart.add(3, [r[i]["Time"], macd[2][i]], -1)
            elif r[i]["Time"] > preTime:
                chart.add(0, [r[i]["Time"], r[i]["Open"], r[i]["High"], r[i]["Low"], r[i]["Close"]])
                chart.add(1, [r[i]["Time"], macd[0][i]])
                chart.add(2, [r[i]["Time"], macd[1][i]])
                chart.add(3, [r[i]["Time"], macd[2][i]])
                preTime = r[i]["Time"]
        Sleep(500)