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我正在尝试使用看起来不错的主意，但有些价格和数量是错误的：

例子：

https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=SMT.LON&apikey=mykey&datatype=json

正如您在下面看到的，2019-08-05 的结果的数量为零，价格小了 2 个数量级。以后还会有更多同样的事情发生。这意味着该 api 不能用于分析。出现这些值有什么原因吗？

{
"Meta Data": {
    "1. Information": "Daily Time Series with Splits and Dividend Events",
    "2. Symbol": "SMT.LON",
    "3. Last Refreshed": "2019-08-07",
    "4. Output Size": "Compact",
    "5. Time Zone": "US/Eastern"
},
"Time Series (Daily)": {
    "2019-08-07": {
        "1. open": "521.0000",
        "2. high": "530.0000",
        "3. low": "519.5000",
        "4. close": "522.1314",
        "5. adjusted close": "522.1314",
        "6. volume": "1259995",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-08-06": {
        "1. open": "516.5000",
        "2. high": "525.9450",
        "3. low": "513.0000",
        "4. close": "518.0000",
        "5. adjusted close": "518.0000",
        "6. volume": "3353161",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-08-05": {
        "1. open": "5.2430",
        "2. high": "5.2430",
        "3. low": "5.2430",
        "4. close": "5.2430",
        "5. adjusted close": "5.2430",
        "6. volume": "0",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-08-02": {
        "1. open": "5.3989",
        "2. high": "5.3989",
        "3. low": "5.3989",
        "4. close": "5.3989",
        "5. adjusted close": "5.3989",
        "6. volume": "0",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-08-01": {
        "1. open": "558.0000",
        "2. high": "568.5000",
        "3. low": "557.0000",
        "4. close": "568.5000",
        "5. adjusted close": "568.5000",
        "6. volume": "2141407",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-07-31": {
        "1. open": "562.5000",
        "2. high": "565.5000",
        "3. low": "560.0580",
        "4. close": "563.0000",
        "5. adjusted close": "563.0000",
        "6. volume": "1519041",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-07-30": {
        "1. open": "5.5441",
        "2. high": "5.5441",
        "3. low": "5.5441",
        "4. close": "5.5441",
        "5. adjusted close": "5.5441",
        "6. volume": "0",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
    "2019-07-29": {
        "1. open": "5.5449",
        "2. high": "5.5449",
        "3. low": "5.5449",
        "4. close": "5.5449",
        "5. adjusted close": "5.5449",
        "6. volume": "0",
        "7. dividend amount": "0.0000",
        "8. split coefficient": "1.0000"
    },
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