Examples with DataSourceView suite.trade.data.DataSourceView used on opensource projects

Example 1 with DataSourceView

use of suite.trade.data.DataSourceView in project suite by stupidsing.

the class MovingAvgMeanReversionBackAllocator method backAllocator.

public BackAllocator backAllocator() {
    return (akds, indices) -> {
        Map<String, DataSource> dsBySymbol = akds.dsByKey.toMap();
        double dailyRiskFreeInterestRate = Trade_.riskFreeInterestRate(1);
        DataSourceView<String, MeanReversionStat> dsv = // 
        DataSourceView.of(tor, 256, akds, (symbol, ds, period) -> new MeanReversionStat(ds, period));
        return index -> {
            Map<String, MeanReversionStat> mrsBySymbol = // 
            akds.dsByKey.map2(// 
            (symbol, ds) -> dsv.get(symbol, index)).filterValue(// 
            mrsReversionStat -> mrsReversionStat != null).toMap();
            // ensure 0 < half-life: determine investment period
            return // 
            Read.from2(mrsBySymbol).filterValue(mrs -> // 
            mrs.adf < 0d && // 
            mrs.hurst < .5d && // 
            mrs.movingAvgMeanReversionRatio() < 0d).map2((symbol, mrs) -> {
                DataSource ds = dsBySymbol.get(symbol);
                double price = ds.prices[index - 1];
                double lma = mrs.latestMovingAverage();
                double diff = mrs.movingAvgMeanReversion.predict(new float[] { (float) lma, 1f });
                double dailyReturn = diff / price - dailyRiskFreeInterestRate;
                ReturnsStat returnsStat = ts.returnsStatDaily(ds.prices);
                double sharpe = returnsStat.sharpeRatio();
                double kelly = dailyReturn * price * price / mrs.movingAvgMeanReversion.sse;
                return new PotentialStat(dailyReturn, sharpe, kelly);
            }).filterValue(// 
            ps -> 0d < ps.kelly).cons(Asset.cashSymbol, // 
            new PotentialStat(Trade_.riskFreeInterestRate, 1d, 0d)).mapValue(// 
            ps -> ps.kelly).sortBy(// 
            (symbol, potential) -> -potential).take(// 
            top).toList();
        };
    };
}