<p>我正在制作一个使用metaapi.cloud的交易机器人，我正在尝试计算移动平均值（快速/指数），但它返回给我无效值，这是我的代码：</p> <pre class="brush:js;toolbar:false;">async movingAverage(symbol, period, type = "S") { let candles = (await this.account.getHistoricalCandles(symbol, this.params.timeframe, null, period)).map(c => c.close); const result = []; let sum = 0; if (type === "S") { for (let i = 0; i < period; i++) { sum += candles[i]; } result.push(sum / period); for (let i = period; i < candles.length; i++) { sum = sum - candles[i - period] + candles[i]; result.push(sum / period) } } else if (type === "E") { const weight = 2 / (period + 1); for (let i = 0; i < period; i++) { sum += candles[i]; } sum /= period; result.push(sum); for (let i = period; i < candles.length; i++) { sum = (candles[i] * weight) + (sum * (1 - weight)); result.push(sum); } } else { // throw Error() } return result; } </pre> <p>这是我的使用方法：</p> <pre class="brush:js;toolbar:false;">async onTick(infos) { let sma = await this.movingAverage(infos.symbol, this.params.fast, "S"); console.log('SMA ' + sma[0]); } </pre> <p>现在，当我测试它时，SMA 应该返回“1906.6963”，但它给我的是“1900.7813” 也许我使用了错误的方法来计算它们？ 如果有人有解决办法！提前致谢。</p>

async function movingAverage(symbol, period, type = "S") {
        let candles = [1,2,3,"","",4, "0",0, null, "99,9123", undefined,"0.123e5", "wrongval", 9, 10, 20, 100]
        .map(d => parseFloat((d ?? "").toString().replace(",",".")))
        .filter(d => +d || +d === 0);
        const result = [];
        if (candles.length <= 0){return result}
        let sum = 0;
        period = Math.min(candles.length, period) || 1;
        for (let i = 0; i < period; i++) {
            sum += candles[i];
        }
        result.push(sum / period);
        for (let i = period; i < candles.length; i++) {
            sum = sum - candles[i - period] + candles[i];
            result.push(sum / period)
        }
        return result;
    }
    movingAverage("SPX",500).then(x => document.getElementById("result").textContent = x)

<div id="result"></div>

getHistoricalCandles(symbol, timeframe, startTime, limit)
symbol: symbol to retrieve candles for
TimeFrame: define the timeframe according to which the candles must be generated
StartTime: time to start loading candles from. Note that candles are loaded in backward direction, so this should be the latest time, **leave it empty to request latest candles**
Limit: maximum of candles to retrieve, must be less or equals to 1000