indicator-supertrend v0.0.1

indicator-supertrend

js version of Olivier Seban's "supertrend" indicator for OHLCV candles

Installation

npm i indicator-supertrend

Usage

var candles = require('candles-sample-aapl').loadNMinuteCandles(60).slice(50);
var superTrend = require('indicator-supertrend').appendSupertrend;

var period = 14;
superTrend(candles, period); //works in-place

console.log(candles.slice(-1)[0]);

// {
//     date: '2022-12-02T20:00:00.000Z',
//     open: 146.9572,
//     high: 147.96,
//     low: 146.91,
//     close: 147.96,
//     bid: 146.95,
//     ask: 146.96,
//     volume: 4031053,
//     nSrcCandles: 17,
//     superTrend: {
//         '14': {
//             fub: 150.5483357142857,
//                 flb: 144.3216642857143,
//                 tr: 1.1350000000000193,
//                 atr: 1.037778571428571,
//                 bub: 150.5483357142857,
//                 blb: 144.3216642857143,
//                 signal: 150.5483357142857,
//                 isSuperTrendBuySignal: false,
//                 isSuperTrendSellSignal: false
//         }
//     }
// }

//rest of code just for charting...

var {drawChartForCandles,saveChartForCandles} = require('ohlc-chart-simple');

candles = candles.map(function(candle,index){
    if( candle.superTrend[period+'']){
        var signalST = candle.superTrend[period+''].signal;
        candle.indicators = {
            ...candle.indicators,
            "ST_LINE": signalST,
            "ST_LINE_color": candle.superTrend[period+''].isBullish ? [0,128,0] :  [128,0,0],
            "ST_LINE_thickness": 1
        }
    }

    return candle;
});

var config = {
    w: Math.floor(1024/2),
    h: Math.floor(700/2),
    profileBucketsTotal: 64,
    profileBucketsWidth: 16,
    volumeBarsHeight: 64,
    bgColor: [255,255,255],

    //alternative to volume profile: arbitrary kernel density histogram
    kdePrices: candles.map(c=>[c.low, 1]), //[value, weight]
    // kdeBandwidthDollars: 0.01,
    kdeBandwidthPercent: 1.00,
    kdeIsGaussian: true, //false == kernel is triangular
    kdeColor: [0,0,255],

    skipDrawOhlcBars: false,
    skipDrawIndicators: false,
    skipDrawLegend: false,
    expandLegendText: false,
    expandTitle: false,
    expandPrice: false,
    skipDrawDate: true,
    skipDrawPrice: false,
    skipDrawPriceBars: false,
    title: "AAPL",
    filename: "./candlestick-chart.png",
}

saveChartForCandles(candles, config);